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By: Wright, Gavin R. - Grant, Tyler J. - United States. Bureau of Land Management. - United States. Bureau of Land Management. El Centro Field Office.Edition:Publication info: [El Centro, California], U.S. Department of the Interior, Bureau of Land Management, 2003Volume:Series:Holding Institution: Bureau of Land ManagementSubjects: 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 CountyBHL Collections: