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  1. By: Gillis, William Thomas, - Howard, R A - Proctor, G R
    Type: Article
    In: Rhodora
    Volume: 75
    Date: 1973
    Page Range: 411--425
    Publication Info: [Cambridge, Mass., etc.]New England Botanical Club [etc.]
  2. By: Howard, R A - Dunbar, Henry F.
    Type: Article
    In: Rhodora
    Volume: 66
    Date: 1964
    Page Range: 6--15
    Publication Info: [Cambridge, Mass., etc.]New England Botanical Club [etc.]
  3. By: Howard, R A - Baranov, Andrey I.
    Type: Article
    In: Arnoldia
    Volume: 24
    Issue: 9
    Date: 1964
    Page Range: 81--86
    Publication Info: Jamaica Plain, Mass.,Arnold Arboretum, Harvard University
  4. By: Howard, R A
    Type: Article
    In: Rhodora
    Volume: 98
    Date: 1997
    Page Range: 445--458
    Publication Info: [Cambridge, Mass., etc.]New England Botanical Club [etc.]
  5. By: Bailey, Irving W. (Irving Widmer), - Howard, R A
    Type: Article
    In: Journal of the Arnold Arboretum.
    Volume: 22
    Issue: 2
    Date: 1941
    Page Range: 171--187
    Publication Info: Cambridge, Mass. :Arnold Arboretum, Harvard University [etc.],1919-
  6. By: Bailey, Irving W. (Irving Widmer), - Howard, R A
    Type: Article
    In: Journal of the Arnold Arboretum.
    Volume: 22
    Issue: 1
    Date: 1941
    Page Range: 125--132
    Publication Info: Cambridge, Mass. :Arnold Arboretum, Harvard University [etc.],1919-
  7. By: Bailey, Irving W. (Irving Widmer), - Howard, R A
    Type: Article
    In: Journal of the Arnold Arboretum.
    Volume: 22
    Issue: 3
    Date: 1941
    Page Range: 432--442
    Publication Info: Cambridge, Mass. :Arnold Arboretum, Harvard University [etc.],1919-
  8. By: Bailey, Irving W. (Irving Widmer), - Howard, R A
    Type: Article
    In: Journal of the Arnold Arboretum.
    Volume: 22
    Issue: 4
    Date: 1941
    Page Range: 556--568
    Publication Info: Cambridge, Mass. :Arnold Arboretum, Harvard University [etc.],1919-
  9. By: Howard, R A
    Type: Article
    In: Journal of the Arnold Arboretum.
    Volume: 54
    Issue: 4
    Date: 1973
    Page Range: 435--470
    Publication Info: Cambridge, Mass. :Arnold Arboretum, Harvard University [etc.],1919-
  10. By: Howard, R A
    Type: Article
    In: Rhodora
    Volume: 70
    Date: 1968
    Page Range: 410--418
    Publication Info: [Cambridge, Mass., etc.]New England Botanical Club [etc.]
  11. By: Howard, R A
    Type: Article
    In: Journal of the Arnold Arboretum.
    Volume: 30
    Issue: 4
    Date: 1949
    Page Range: 388--424
    Publication Info: Cambridge, Mass. :Arnold Arboretum, Harvard University [etc.],1919-
  12. By: Howard, R A
    Type: Article
    In: Arnoldia
    Volume: 18
    Issue: 4
    Date: 1958
    Page Range: 17--24
    Publication Info: Jamaica Plain, Mass.,Arnold Arboretum, Harvard University
  13. By: Howard, R A - Staples, George W.
    Type: Article
    In: Journal of the Arnold Arboretum.
    Volume: 64
    Issue: 4
    Date: 1983
    Page Range: 511--546
    Publication Info: Cambridge, Mass. :Arnold Arboretum, Harvard University [etc.],1919-
  14. By: Briggs, Winslow R. (Winslow Russell), - Howard, R A
    Type: Article
    In: Journal of the Arnold Arboretum.
    Volume: 34
    Issue: 2
    Date: 1953
    Page Range: 182--186
    Publication Info: Cambridge, Mass. :Arnold Arboretum, Harvard University [etc.],1919-
  15. By: Howard, R A - Kellogg, Elizabeth Anne
    Type: Article
    In: Journal of the Arnold Arboretum.
    Volume: 67
    Issue: 2
    Date: 1986
    Page Range: 233--255
    Publication Info: Cambridge, Mass. :Arnold Arboretum, Harvard University [etc.],1919-
  16. By: Howard, R A
    Type: Article
    In: Journal of the Arnold Arboretum.
    Volume: 62
    Issue: 1
    Date: 1981
    Page Range: 45--61
    Publication Info: Cambridge, Mass. :Arnold Arboretum, Harvard University [etc.],1919-
  17. By: Howard, R A
    Type: Article
    In: Phytologia.
    Volume: 65
    Date: 1988
    Page Range: 285--289
    Publication Info: Bronx Park, New York,H.A. Gleason and H.N. Moldenke,
  18. By: Howard, R A
    Type: Article
    In: Journal of the Arnold Arboretum.
    Volume: 47
    Date: 1966
    Page Range: 137--146
    Publication Info: Cambridge, Mass. :Arnold Arboretum, Harvard University [etc.],1919-
  19. By: Howard, R A
    Type: Article
    In: Journal of the Arnold Arboretum.
    Volume: 54
    Issue: 3
    Date: 1973
    Page Range: 377--411
    Publication Info: Cambridge, Mass. :Arnold Arboretum, Harvard University [etc.],1919-
  20. By: Howard, R A
    Type: Article
    In: Journal of the Arnold Arboretum.
    Volume: 38
    Issue: 1
    Date: 1957
    Page Range: 81--106
    Publication Info: Cambridge, Mass. :Arnold Arboretum, Harvard University [etc.],1919-
  21. By: Howard, R A
    Type: Article
    In: Journal of the Arnold Arboretum.
    Volume: 38
    Issue: 3
    Date: 1957
    Page Range: 211--242
    Publication Info: Cambridge, Mass. :Arnold Arboretum, Harvard University [etc.],1919-
  22. By: Howard, R A
    Type: Article
    In: Journal of the Arnold Arboretum.
    Volume: 41
    Issue: 2
    Date: 1960
    Page Range: 213--229
    Publication Info: Cambridge, Mass. :Arnold Arboretum, Harvard University [etc.],1919-
  23. By: Howard, R A
    Type: Article
    In: Journal of the Arnold Arboretum.
    Volume: 39
    Issue: 1
    Date: 1958
    Page Range: 1--48
    Publication Info: Cambridge, Mass. :Arnold Arboretum, Harvard University [etc.],1919-
  24. By: Howard, R A
    Type: Article
    In: Journal of the Arnold Arboretum.
    Volume: 40
    Date: 1959
    Page Range: 68--93
    Publication Info: Cambridge, Mass. :Arnold Arboretum, Harvard University [etc.],1919-
  25. By: Howard, R A
    Type: Article
    In: Journal of the Arnold Arboretum.
    Volume: 40
    Issue: 2
    Date: 1959
    Page Range: 176--203
    Publication Info: Cambridge, Mass. :Arnold Arboretum, Harvard University [etc.],1919-
  26. By: Howard, R A
    Type: Article
    In: Journal of the Arnold Arboretum.
    Volume: 42
    Issue: 1
    Date: 1961
    Page Range: 87--95
    Publication Info: Cambridge, Mass. :Arnold Arboretum, Harvard University [etc.],1919-
  27. By: Howard, R A
    Type: Article
    In: Journal of the Arnold Arboretum.
    Volume: 21
    Date: 1940
    Page Range: 461--489
    Publication Info: Cambridge, Mass. :Arnold Arboretum, Harvard University [etc.],1919-
  28. By: Howard, R A
    Type: Article
    In: Journal of the Arnold Arboretum.
    Volume: 23
    Issue: 1
    Date: 1942
    Page Range: 55--78
    Publication Info: Cambridge, Mass. :Arnold Arboretum, Harvard University [etc.],1919-
  29. By: Howard, R A
    Type: Article
    In: Journal of the Arnold Arboretum.
    Volume: 23
    Issue: 4
    Date: 1942
    Page Range: 479--494
    Publication Info: Cambridge, Mass. :Arnold Arboretum, Harvard University [etc.],1919-
  30. By: Howard, R A - Bremer, Kåre,
    Type: Article
    In: Rhodora
    Volume: 84
    Date: 1982
    Page Range: 143--147
    Publication Info: [Cambridge, Mass., etc.]New England Botanical Club [etc.]
  31. By: Howard, R A
    Type: Article
    In: Phytologia.
    Volume: 61
    Date: 1986
    Page Range: 1--4
    Publication Info: Bronx Park, New York,H.A. Gleason and H.N. Moldenke,
  32. By: Howard, R A
    Type: Article
    In: Journal of the Arnold Arboretum.
    Volume: 66
    Issue: 4
    Date: 1985
    Page Range: 503--508
    Publication Info: Cambridge, Mass. :Arnold Arboretum, Harvard University [etc.],1919-
  33. By: Howard, R A - Zanoni, Thomas A.
    Type: Article
    In: Moscosoa : contribuciones científicas del Jardín Botánico Nacional "Dr. Rafael M. Moscoso".
    Volume: 5
    Date: 1989
    Page Range: 216--225
    Publication Info: Santo Domingo :El Jardín,1976-
  34. By: Howard, R A
    Type: Article
    In: Rhodora
    Volume: 49
    Date: 1947
    Page Range: 286--288
    Publication Info: [Cambridge, Mass., etc.]New England Botanical Club [etc.]
  35. By: Howard, R A
    Type: Article
    In: Journal of the Arnold Arboretum.
    Volume: 36
    Date: 1955
    Page Range: 209--239
    Publication Info: Cambridge, Mass. :Arnold Arboretum, Harvard University [etc.],1919-
  36. By: Howard, R A - Proctor, G R
    Type: Article
    In: Journal of the Arnold Arboretum.
    Volume: 38
    Issue: 2
    Date: 1957
    Page Range: 151--169
    Publication Info: Cambridge, Mass. :Arnold Arboretum, Harvard University [etc.],1919-
  37. By: Kellogg, Elizabeth Anne - Howard, R A
    Type: Article
    In: Journal of the Arnold Arboretum.
    Volume: 67
    Issue: 1
    Date: 1986
    Page Range: 65--107
    Publication Info: Cambridge, Mass. :Arnold Arboretum, Harvard University [etc.],1919-
  38. By: Howard, R A - Howard, E S
    Type: Article
    In: Journal of the Arnold Arboretum.
    Volume: 63
    Issue: 1
    Date: 1982
    Page Range: 63--81
    Publication Info: Cambridge, Mass. :Arnold Arboretum, Harvard University [etc.],1919-
  39. By: Clausen, Kristin S. - Gillis, William Thomas, - Howard, R A
    Type: Article
    In: Journal of the Arnold Arboretum.
    Volume: 62
    Issue: 2
    Date: 1981
    Page Range: 211--242
    Publication Info: Cambridge, Mass. :Arnold Arboretum, Harvard University [etc.],1919-