"The methods described in this manual are those used by the laboratory at the National Soil Survey Center (NSSC)"--Preface. Replaces Procedures for collecting soil samples and methods of analysis for soil survey, Soil survey investigations report, no. 1, 1984. "Version 3.0." "January 1996."
Includes bibliographical references.
Microfiche. [Washington, D.C.], U.S. G.P.O., 1996. 8 microfiches : negative.