JOHNSON Leon J. (1979). Introductory soil science: A study guide and laboratory manual. Macmillan.
Chicago Style (17th ed.) CitationJOHNSON Leon J. Introductory Soil Science: A Study Guide and Laboratory Manual. New York: Macmillan, 1979.
MLA (9th ed.) CitationJOHNSON Leon J. Introductory Soil Science: A Study Guide and Laboratory Manual. Macmillan, 1979.
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