WESTERMAN, R. L. (1990). Soil testing and analysis. Soil Science sociaty America.
Chicagoスタイル(17版)引用形式WESTERMAN, R. L. Soil Testing and Analysis. Soil Science sociaty America, 1990.
MLA(8版)引用形式WESTERMAN, R. L. Soil Testing and Analysis. Soil Science sociaty America, 1990.
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