Fragipans : their occurrence, classification, and genesis : proceedings of a symposium
sponsored by Divisions S-5 and S-9 of the Soil Science Society of America in Atlanta, GA, 1 Dec. 1987 ; editors, Neil E. Smeck and Edward J. Ciolkosz
(SSSA special publication, no. 24)
Soil Science Society of America, 1989
Includes bibliographies
Soil Science Society of America