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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Timberlake, P. H. (Philip Hunter),
    Publication info: New York, N.Y, American Museum of Natural History, [1967]
    Holding Institution: American Museum of Natural History Library
    Subjects: 59.57,99P(79.1)  Arizona  Bees  Classification  Insects  Pseudopanurgus  
  2. By: Timberlake, P. H. (Philip Hunter),
    Publication info: New York, N.Y American Museum of Natural History [1964]
    Holding Institution: American Museum of Natural History Library
    Subjects: 59.57,99P(7)  Bees  Classification  Costa Rica  Insects  Mexico  Pseudopanurgus  Southwest, New