@book{buol_hole_mccracken_southard_1997, title={Soil genesis and classification (4th ed.)}, ISBN={081381460X}, publisher={Ames: Iowa State University Press}, author={Buol, S. W. and Hole, F. D. and McCracken, R. J. and Southard, R. J.}, year={1997} }
 @book{buol_hole_mccracken_1989, title={Soil genesis and classification (3rd ed.)}, ISBN={0813814626}, publisher={Ames: Iowa State University Press}, author={Buol, S. W. and Hole, F. D. and McCracken, R. J.}, year={1989} }
 @article{mccracken_daniels_fulcher_1989, title={UNDISTURBED SOILS, LANDSCAPES, AND VEGETATION IN A NORTH-CAROLINA PIEDMONT VIRGIN FOREST}, volume={53}, ISSN={["1435-0661"]}, DOI={10.2136/sssaj1989.03615995005300040026x}, abstractNote={Abstract}, number={4}, journal={SOIL SCIENCE SOCIETY OF AMERICA JOURNAL}, author={MCCRACKEN, RJ and DANIELS, RB and FULCHER, WE}, year={1989}, pages={1146–1152} }
 @book{buol_hole_mccracken_1980, title={Soil genesis and classification (2nd ed.)}, ISBN={081381460X}, publisher={Ames: Iowa State University Press}, author={Buol, S. W. and Hole, F. D. and McCracken, R. J.}, year={1980} }
 @book{buol_hole_mccracken_1973, title={Soil genesis and classification (1st ed.)}, ISBN={081381460X}, publisher={Ames: Iowa State University Press}, author={Buol, S. W. and Hole, F. D. and McCracken, R. J.}, year={1973} }
 @book{mccracken_pedersen_aull_1971, title={Soils of the Hayesville, Cecil and Pacolet series in southern Appalachian and Piedmont regions of the United States}, number={157}, journal={Soils of the Hayesville, Cecil and Pacolet series in southern Appalachian and Piedmont regions of the United States}, publisher={Raleigh, N.C.:  North Carolina State University}, author={McCracken, R. J. and Pedersen, E. J. and Aull, L. E.}, year={1971}, pages={60} }