Gerard, C. J. (1964). Hardpan formation in coarse and medium-textured soils in the lower Rio Grande Valley of Texas. Texas Agricultural Experiment Station.
Chicago Style (17th ed.) CitationGerard, C. J. Hardpan Formation in Coarse and Medium-textured Soils in the Lower Rio Grande Valley of Texas. College Station: Texas Agricultural Experiment Station, 1964.
MLA (9th ed.) CitationGerard, C. J. Hardpan Formation in Coarse and Medium-textured Soils in the Lower Rio Grande Valley of Texas. Texas Agricultural Experiment Station, 1964.
Warning: These citations may not always be 100% accurate.