United States. Bureau of Soils, Hearn, W. E., & Burgess, J. L. (1903). Soil map, Texas, Lufkin sheet. U.S. Dept. of Agriculture, Bureau of Soils.
Chicago Style (17th ed.) CitationUnited States. Bureau of Soils, W. Edward Hearn, and James L. Burgess. Soil Map, Texas, Lufkin Sheet. [Washington, D.C.]: U.S. Dept. of Agriculture, Bureau of Soils, 1903.
MLA (9th ed.) CitationUnited States. Bureau of Soils, et al. Soil Map, Texas, Lufkin Sheet. U.S. Dept. of Agriculture, Bureau of Soils, 1903.
Warning: These citations may not always be 100% accurate.