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  1. By: Orr, R T - Banks, Richard C. (Richard Charles),
    Type: Article
    In: Proceedings of the California Academy of Sciences, 4th series
    Volume: 30
    Series: 4
    Date: 1964
    Page Range: 207--210
    Publication Info: San Francisco California Academy of Sciences
  2. By: Orr, R T
    Type: Article
    In: Proceedings of the Biological Society of Washington
    Volume: 48
    Date: 1935
    Page Range: 27--30
    Publication Info: Washington, Biological Society of Washington,
  3. By: Hall, E. Raymond (Eugene Raymond), - Orr, R T
    Type: Article
    In: Proceedings of the Biological Society of Washington
    Volume: 46
    Date: 1933
    Page Range: 41--43
    Publication Info: Washington, Biological Society of Washington,
  4. By: Orr, R T - Silva Taboada, Gilberto
    Type: Article
    In: Proceedings of the Biological Society of Washington
    Volume: 73
    Date: 1960
    Page Range: 83--86
    Publication Info: Washington, Biological Society of Washington,
  5. By: Orr, R T - Webster, J. Dan (Jackson Dan)
    Type: Article
    In: Proceedings of the Biological Society of Washington
    Volume: 81
    Date: 1968
    Page Range: 37--40
    Publication Info: Washington, Biological Society of Washington,
  6. By: Orr, R T
    Type: Article
    In: Proceedings of the California Academy of Sciences, 4th series
    Volume: 27
    Series: 4
    Date: 1951
    Page Range: 1--14
    Publication Info: San Francisco California Academy of Sciences
  7. By: Orr, R T - Poulter, T C
    Type: Article
    In: Proceedings of the California Academy of Sciences, 4th series
    Volume: 32
    Series: 4
    Date: 1965
    Page Range: 377--404
    Publication Info: San Francisco California Academy of Sciences
  8. By: Radford, K W - Orr, R T - Hubbs, Carl L. (Carl Leavitt),
    Type: Article
    In: Proceedings of the California Academy of Sciences, 4th series
    Volume: 31
    Series: 4
    Date: 1965
    Page Range: 601--612
    Publication Info: San Francisco California Academy of Sciences
  9. By: Orr, R T
    Type: Article
    In: Proceedings of the Biological Society of Washington
    Volume: 47
    Date: 1934
    Page Range: 109--111
    Publication Info: Washington, Biological Society of Washington,