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  1. By: Vivar, Elena - Pacheco, Víctor - Valqui, Michael H.,
    Publication info: New York, N.Y, American Museum of Natural History, c1997
    Holding Institution: American Museum of Natural History Library
  2. By: Pacheco, Víctor - Valqui, Michael H., - Vivar, Elena
    Publication info: 1997
    Holding Institution: American Museum of Natural History Library