Weir, W. W. (1936). Soil science: Its, principles and practice. J. B. Lippincott.
Tohutoru Kātū Chicago (17th ed.)Weir, Wilbert Walter. Soil Science: Its, Principles and Practice. Chicago: J. B. Lippincott, 1936.
Tohutoro MLA (9th ed.)Weir, Wilbert Walter. Soil Science: Its, Principles and Practice. J. B. Lippincott, 1936.
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