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  1. By: United States. Bureau of Land Management. - United States. Bureau of Land Management. El Centro Field Office.
    Publication info: El Centro, California, U.S. Department of the Interior, Bureau of Land Management, California State Office, California Desert District, El Centro Field Office, [2002]
    Holding Institution: Bureau of Land Management
    Subjects: California  Desert conservation  Environmental aspects  Imperial County  Management  Off-road vehicles  Public lands  Roads  
  2. By: Wright, Gavin R. - United States. Bureau of Land Management.
    Publication info: El Centro, California, U.S. Department of the Interior, Bureau of Land Management, [2002.]
    Holding Institution: Bureau of Land Management
    Subjects: California  Horned toads  Imperial County  Lizards  
  3. By: Wright, Gavin R. - Grant, Tyler J. - United States. Bureau of Land Management. - United States. Bureau of Land Management. El Centro Field Office.
    Publication info: [El Centro, California], U.S. Department of the Interior, Bureau of Land Management, 2003
    Holding Institution: Bureau of Land Management
    Subjects: California  Effect of off-road vehicles on  Horned toads  Imperial County  Imperial Sand Dunes Recreation Area  Imperial Sand Dunes Recreation Area (Calif.)  Lizards  Phrynosomatidae  Population  San Diego County  
  4. By: Wright, Gavin R. - United States. Bureau of Land Management.
    Publication info: El Centro, California, U.S. Department of the Interior, Bureau of Land Management, [1993.]
    Holding Institution: Bureau of Land Management
    Subjects: California  Horned toads  Imperial County  Lizards  Phrynosoma mcallii  
  5. 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  
  6. 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  
  7. By: Stephens, Kate (Katherine Brown),
    Publication info: San Diego Natural History Museum Research Library
    Holding Institution: San Diego Natural History Museum Research Library
    Subjects: 1849-1937  Butterflies  California  Field notes  Imperial County  Natural history  San Diego County  Stephens, Frank,  
  8. By: Stephens, Kate (Katherine Brown),
    Publication info: San Diego Natural History Museum Research Library
    Holding Institution: San Diego Natural History Museum Research Library
    Subjects: 1849-1937  California  Field notes  Imperial County  Natural history  San Diego County  Stephens, Frank,  
  9. By: Huey, Laurence M. (Laurence Markham),
    Publication info: San Diego Natural History Museum Research Library,
    Holding Institution: San Diego Natural History Museum Research Library
    Subjects: 1876-1951  Arizona  California  Canfield, May R.,  Field notes  Imperial County  Natural history  Ornithology