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  1. By: Manchester, Steven R.,
    Publication info: [St. Louis, Mo.], Missouri Botanical Garden, 1987
    Holding Institution: Missouri Botanical Garden, Peter H. Raven Library
  2. By: Crane, Peter R. - Manchester, Steven R., - Dilcher, David L.
    Publication info: Chicago, Ill, Field Museum of Natural History, ©1990
    Holding Institution: Field Museum of Natural History Library