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  1. By: Johnson, Robert A
    Type: Article
    In: The Wilson bulletin
    Volume: 75
    Issue: 3
    Date: 1963
    Page Range: 270--272
    Publication Info: Columbus, Ohio, Wilson Ornithological Society, 1894-
  2. By: Johnson, Robert A
    Type: Article
    In: The Wilson bulletin
    Volume: 81
    Issue: 1
    Date: 1969
    Page Range: 79--86
    Publication Info: Columbus, Ohio, Wilson Ornithological Society, 1894-
  3. By: Rissing, Steven W - Johnson, Robert A - Pollock, Gregory B
    Type: Article
    In: Psyche
    Volume: 93
    Date: 1986
    Page Range: 177--186
    Publication Info: Cambridge, Mass, Cambridge Entomological Club,
  4. By: Johnson, Robert A - Overson, Rick P
    Type: Article
    In: Journal of Hymenoptera research
    Volume: 18
    Date: 2009
    Page Range: 305--314
    Publication Info: Washington, D.C, International Society of Hymenopterists, [1992-
  5. By: Johnson, Robert A
    Type: Article
    In: Journal of Hymenoptera research
    Volume: 9
    Date: 2000
    Page Range: 377--384
    Publication Info: Washington, D.C, International Society of Hymenopterists, [1992-