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  1. By: Stephens, Frank,
    Publication info: San Diego Natural History Museum Research Library,
    Holding Institution: San Diego Natural History Museum Research Library
    Subjects: California  Collecting  Field notes  Imperial County  Natural history  Riverside County  San Bernardino County  
  2. By: Stephens, Kate (Katherine Brown),
    Publication info: San Diego Natural History Museum Research Library, 1902
    Holding Institution: San Diego Natural History Museum Research Library
    Subjects: 1849-1937  Botany  California  Collectors and collecting  Field notes  Imperial County  Mammalogy  Natural history  Riverside County  Stephens, Frank  
  3. By: Axelrod, Daniel I. - Hazen, Guy.
    Publication info: New York City, The American Museum of Natural History, [1934]
    Holding Institution: American Museum of Natural History Library
    Subjects: 56.1(1183:79.4)  California  Paleobotany  Plants, Fossil  Pliocene  Riverside County
  4. By: U.S. Fish and Wildlife Service. Region 1.
    Publication info: Portland, Or, Region 1, U.S. Fish and Wildlife Service, [2001]
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
    Subjects: Butterflies  California  Endangered species  Nymphalidae  Riverside County  San Diego County