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  1. By: Cockerell, Theodore D. A. (Theodore Dru Alison),
    Publication info: New York City, The American Museum of Natural History, [1934]
    Holding Institution: American Museum of Natural History Library
    Subjects: 59.57,99(73W)  Bees  Classification  Colorado  Insects  Texas
  2. By: Cockerell, Theodore D. A. (Theodore Dru Alison),
    Publication info: New York City, The American Museum of Natural History, [1935]
    Holding Institution: American Museum of Natural History Library
    Subjects: 59.57,99(73W)  Bees  Classification  Insects  West (U.S.)
  3. By: Cockerell, Theodore D. A. (Theodore Dru Alison),
    Publication info: New York City, The American Museum of Natural History, [1934]
    Holding Institution: American Museum of Natural History Library
    Subjects: 59.57,99(73W)  Bees  Classification  Insects  West (U.S.)
  4. By: Cockerell, Theodore D. A. (Theodore Dru Alison),
    Publication info: New York City, The American Museum of Natural History, [1936]
    Holding Institution: American Museum of Natural History Library
    Subjects: 59.57,99(73W)  Bees  Classification  Insects  West (U.S.)