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  1. By: Heck, J. G. (Johann Georg), - Baird, Spencer Fullerton,
    Publication info: New York, R. Garrigue, 1851
    Holding Institution: American Museum of Natural History Library
  2. By: Heck, J. G. (Johann Georg), - Baird, Spencer Fullerton, - Garrigue, Rudolph Peter, - Craighead, Robert
    Publication info: New York, R. Garrigue, 1852
    Holding Institution: Smithsonian Libraries and Archives