United States. Soil Conservation Service. Texas Agricultural Experiment Station. cartographic Maps. lcgft https://id.loc.gov/authorities/genreForms/gf2011026387 Fort Worth, Tex. : USDA-SCS, 1980. eng "September 1980 4-R-37540." "Base compiled from Texas general highway map ..." "Source: Original draft by State Soil Survey Staff." "This general soil map is suitable for broad planning purposes only." Includes descriptive index, location map, and table of "Proportion of area in the county." Text and table of "Soil interpretaion for selected uses" on verso. Soils--Texas--Cameron County--Maps. United States Texas Cameron County. Available also through the Library of Congress Web site as a raster image. https://hdl.loc.gov/loc.gmd/g4033c.ct011499