Ralph J. McCracken

Buol, S. W., Hole, F. D., McCracken, R. J., & Southard, R. J. (1997). Soil genesis and classification (4th ed.). Ames: Iowa State University Press.

Buol, S. W., Hole, F. D., & McCracken, R. J. (1989). Soil genesis and classification (3rd ed.). Ames: Iowa State University Press.

MCCRACKEN, R. J., DANIELS, R. B., & FULCHER, W. E. (1989). UNDISTURBED SOILS, LANDSCAPES, AND VEGETATION IN A NORTH-CAROLINA PIEDMONT VIRGIN FOREST. SOIL SCIENCE SOCIETY OF AMERICA JOURNAL, 53(4), 1146–1152. https://doi.org/10.2136/sssaj1989.03615995005300040026x

Buol, S. W., Hole, F. D., & McCracken, R. J. (1980). Soil genesis and classification (2nd ed.). Ames: Iowa State University Press.

Buol, S. W., Hole, F. D., & McCracken, R. J. (1973). Soil genesis and classification (1st ed.). Ames: Iowa State University Press.

McCracken, R. J., Pedersen, E. J., & Aull, L. E. (1971). Soils of the Hayesville, Cecil and Pacolet series in southern Appalachian and Piedmont regions of the United States. In Soils of the Hayesville, Cecil and Pacolet series in southern Appalachian and Piedmont regions of the United States (p. 60). Raleigh, N.C.:  North Carolina State University.