Johnson, Leon J. Introductory Soil Science : A Study Guide And Laboratory Manual / by Leon J. Johnson - New York : Macmillan Pub. Co., 1979 - xiii, 289 pages .: table, illustrations .; 28 cm ISBN: 0023611200 Subjects--Topical Terms: Soil science --Laboratory manuals.Soils Dewey Class. No.: 631.4 / JOH 1979