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  1. By: Gertsch, Willis John,
    Publication info: New York City, The American Museum of Natural History, [1935]
    Holding Institution: American Museum of Natural History Library
    Subjects: 59.54,4P  Arachnida  Classification  Spiders  United States
  2. By: Gertsch, Willis John,
    Publication info: New York City, The American Museum of Natural History, [1932]
    Holding Institution: American Museum of Natural History Library
    Subjects: 59.54,4P  Arachnida  Bassaniana  Classification  Crab spiders  Nomenclature  North America  Thomisidae
  3. By: Gertsch, Willis John,
    Publication info: New York City, The American Museum of Natural History, [1939]
    Holding Institution: American Museum of Natural History Library
    Subjects: 59.54,4P  Arachnida  Barro Colorado island  Classification  Galapagos Islands  Mexico  Panama  Pholcidae  Pholcophorina  Spiders
  4. By: Gertsch, Willis John,
    Publication info: New York, N.Y American Museum of Natural History [1958]
    Holding Institution: American Museum of Natural History Library
    Subjects: 59.54,4P  Arachnida  Classification  Mexico  Plectreuridae  Southwestern States  Spiders