Soil survey techniques : proceedings of a symposium sponsored by Division S-5, "Soil Genesis, Morphology, and Classification," of the Soil Science Society of America, 4 Dec. 1985, in Chicago, IL / editors, W.U. Reybold and G.W. Petersen. (SSSA special publication ; no. 20)
Soil survey techniques : proceedings of a symposium sponsored by Division S-5, "Soil Genesis, Morphology, and Classification," of the Soil Science Society of America, 4 Dec. 1985, in Chicago, IL / editors, W.U. Reybold and G.W. Petersen.