G. W. Olson, “Criteria for Making and Interpreting a Soil Profile Description: A Complication of the Official USDA Procedure and Nomenclature for Describing Soils”, kgsbulletin, no. 212, pp. 1–48, Jan. 1976, Accessed: Nov. 03, 2024. [Online]. Available: https://journals.ku.edu/kgsbulletin/article/view/22262