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  1. By: Greenfield, David W. - Johnson, Robert Karl
    Publication info: Chicago, Ill, Field Museum of Natural History, 1981
    Holding Institution: University Library, University of Illinois Urbana Champaign
  2. By: Johnson, Robert Karl
    Publication info: Chicago, Ill, Field Museum of Natural History, [1982]
    Holding Institution: University Library, University of Illinois Urbana Champaign
  3. By: Johnson, Robert Karl
    Publication info: Chicago, Field Museum of Natural History, 1974
    Holding Institution: University Library, University of Illinois Urbana Champaign
  4. By: Johnson, Robert Karl - Feltes, Ross M.
    Publication info: Chicago, Field Museum of Natural History, 1984
    Holding Institution: University Library, University of Illinois Urbana Champaign
  5. By: Johnson, Robert Karl - Greenfield, David W.
    Publication info: [Chicago], Field Museum of Natural History, 1976
    Holding Institution: University Library, University of Illinois Urbana Champaign
  1. By: Harold, Antony S - Wessel, James H. - Johnson, Robert Karl
    Type: Article
    In: Proceedings of the Biological Society of Washington
    Volume: 111
    Date: 1998
    Page Range: 942--953
    Publication Info: Washington Biological Society of Washington
  2. By: Johnson, Robert Karl
    Type: Article
    In: Field Museum of Natural History bulletin
    Volume: 52
    Issue: 9
    Date: 1981
    Page Range: 18--23
    Publication Info: [Chicago, Ill.], The Museum, [1972]-©1990
  3. By: Johnson, Robert Karl
    Type: Article
    In: Field Museum of Natural History bulletin
    Volume: 53
    Issue: 2
    Date: 1982
    Page Range: 20--24
    Publication Info: [Chicago, Ill.], The Museum, [1972]-©1990
  4. By: Johnson, Robert Karl
    Type: Article
    In: Fieldiana. Zoology
    Volume: 66
    Date: 1974
    Page Range: 1--249
    Publication Info: [Chicago] Chicago Natural History Museum [1945?-
  5. By: Johnson, Robert Karl - Feltes, Ross M.
    Type: Article
    In: Fieldiana. Zoology
    Volume: 22
    Date: 1984-02-29
    Page Range: 1--47
    Publication Info: [Chicago] Chicago Natural History Museum [1945?-
  6. By: Johnson, Robert Karl - Greenfield, David W.
    Type: Article
    In: Fieldiana. Zoology
    Volume: 70
    Date: 1976
    Page Range: 13--28
    Publication Info: [Chicago] Chicago Natural History Museum [1945?-