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  1. By: Hammer, Samuel
    Type: Article
    In: Rhodora
    Volume: 99
    Date: 1997
    Page Range: 23--32
    Publication Info: [Cambridge, Mass., etc.] New England Botanical Club [etc.]
  2. By: Hammer, Samuel
    Type: Article
    In: Mycotaxon
    Volume: 34
    Issue: 1
    Date: 1989
    Page Range: 115--118
    Publication Info: Ithaca, N.Y Mycotaxon
  3. By: Hammer, Samuel
    Type: Article
    In: Mycotaxon
    Volume: 52
    Issue: 2
    Date: 1994
    Page Range: 475--493
    Publication Info: Ithaca, N.Y Mycotaxon
  4. By: Hammer, Samuel
    Type: Chapter
    In: Lichenographia Thomsoniana : North American lichenology in honor of John W. Thomson
    Date: 1998
    Page Range: 5--19
    Publication Info: Ithaca, NY, Mycotaxon, Ltd, 1998
  5. By: Hammer, Samuel
    Type: Article
    In: Rhodora
    Volume: 103
    Date: 2001
    Page Range: 405--415
    Publication Info: [Cambridge, Mass., etc.] New England Botanical Club [etc.]
  6. By: Hammer, Samuel
    Type: Article
    In: Rhodora
    Volume: 104
    Date: 2002
    Page Range: 96--99
    Publication Info: [Cambridge, Mass., etc.] New England Botanical Club [etc.]
  7. By: Hammer, Samuel - Ahti, Teuvo
    Type: Article
    In: Mycotaxon
    Volume: 37
    Date: 1990
    Page Range: 335--348
    Publication Info: Ithaca, N.Y Mycotaxon
  8. By: Hammer, Samuel
    Type: Article
    In: Madroño; a West American journal of botany
    Volume: 36
    Date: 1989
    Page Range: 169--174
    Publication Info: Berkeley California Botanical Society
  9. By: Hammer, Samuel
    Type: Article
    In: Mycotaxon
    Volume: 40
    Date: 1991
    Page Range: 169--197
    Publication Info: Ithaca, N.Y Mycotaxon
  10. By: Hammer, Samuel
    Type: Article
    In: Rhodora
    Volume: 99
    Date: 1997
    Page Range: 287--301
    Publication Info: [Cambridge, Mass., etc.] New England Botanical Club [etc.]