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  1. By: Sorensen, Paul Davidsen,
    Type: Article
    In: Rhodora
    Volume: 71
    Date: 1969
    Page Range: 309--365
    Publication Info: [Cambridge, Mass., etc.]New England Botanical Club [etc.]
  2. By: Sorensen, Paul Davidsen,
    Type: Article
    In: Rhodora
    Volume: 71
    Date: 1969
    Page Range: 367--416
    Publication Info: [Cambridge, Mass., etc.]New England Botanical Club [etc.]
  3. By: Sorensen, Paul Davidsen,
    Type: Article
    In: Rhodora
    Volume: 71
    Date: 1969
    Page Range: 565--565
    Publication Info: [Cambridge, Mass., etc.]New England Botanical Club [etc.]
  4. By: Sorensen, Paul Davidsen,
    Type: Article
    In: Arnoldia
    Volume: 30
    Issue: 4
    Date: 1970
    Page Range: 121--138
    Publication Info: Jamaica Plain, Mass.,Arnold Arboretum, Harvard University
  5. By: Sorensen, Paul Davidsen,
    Type: Article
    In: Journal of the Arnold Arboretum.
    Volume: 59
    Issue: 1
    Date: 1978
    Page Range: 68--73
    Publication Info: Cambridge, Mass. :Arnold Arboretum, Harvard University [etc.],1919-
  6. By: Sorensen, Paul Davidsen,
    Type: Article
    In: Rhodora
    Volume: 82
    Date: 1980
    Page Range: 353--360
    Publication Info: [Cambridge, Mass., etc.]New England Botanical Club [etc.]
  7. By: Sorensen, Paul Davidsen,
    Type: Article
    In: Rhodora
    Volume: 83
    Date: 1981
    Page Range: 145--146
    Publication Info: [Cambridge, Mass., etc.]New England Botanical Club [etc.]
  8. By: Saar, Dayle E. - Sorensen, Paul Davidsen,
    Type: Article
    In: Novon a journal of botanical nomenclature from the Missouri Botanical Garden.
    Volume: 10
    Date: 2000
    Page Range: 407--410
    Publication Info: St. Louis, MO :Missouri Botanical Garden,
  9. By: Saar, Dayle E. - Sorensen, Paul Davidsen, - Hjerting, J P
    Type: Article
    In: Acta Botánica Mexicana
    Volume: 64
    Date: 2003
    Page Range: 19--24
    Publication Info: México :Instituto de Ecología, A C.,1988-
  10. By: Saar, Dayle E. - Sorensen, Paul Davidsen,
    Type: Article
    In: SIDA, contributions to botany.
    Volume: 21
    Date: 2005
    Page Range: 2161--2167
    Publication Info: [Dallas :W. F. Mahler, etc.]1962-
  11. By: Saar, Dayle E. - Sorensen, Paul Davidsen,
    Type: Article
    In: SIDA, contributions to botany.
    Volume: 22
    Date: 2006
    Page Range: 545--545
    Publication Info: [Dallas :W. F. Mahler, etc.]1962-
  12. By: González Elizondo, M. Socorro (María Socorro) - Gonzalez Elizondo, Martha. - Sorensen, Paul Davidsen,
    Type: Article
    In: Acta Botánica Mexicana
    Volume: 99
    Date: 2012
    Page Range: 55--72
    Publication Info: México :Instituto de Ecología, A C.,1988-