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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. - Greenfield, David W.
    Publication info: [Chicago] :Field Museum of Natural History,1976.
    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.
    Publication info: Chicago :Field Museum of Natural History,1974.
    Holding Institution: University Library, University of Illinois Urbana Champaign