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  1. By: Freeman, Hugh Avery
    Publication info: New York, N.Y, American Museum of Natural History, [1955]
    Holding Institution: American Museum of Natural History Library
    Subjects: 59.57,89M(76.4)  Butterflies  Classification  Georgia  Insects  Megathymus  Mexico  Texas  
  2. By: Freeman, Hugh Avery
    Publication info: New York, N.Y American Museum of Natural History [1962]
    Holding Institution: American Museum of Natural History Library
    Subjects: 59.57,89M(76.4)  Agathymus diabloensis  Agaves  Butterflies  Classification  Diseases and pests  Hudspeth County  Insects  Larvae  Texas
  3. By: Freeman, Hugh Avery - Hoffmann, Carlos C.
    Publication info: New York, American Museum of Natural History, [1952]
    Holding Institution: American Museum of Natural History Library
    Subjects: 59.57,89M(76.4)  Big Bend National Park  Butterflies  Classification  Insects  Megathymus chisoensis  Megathymus hoffmanni  Mexico  Texas