Cooke, G. W. (1967). The control of soil fertility. Crosby Lockwood.
Tohutoru Kātū Chicago (17th ed.)Cooke, G. W. The Control of Soil Fertility. Londres: Crosby Lockwood, 1967.
Tohutoro MLA (9th ed.)Cooke, G. W. The Control of Soil Fertility. Crosby Lockwood, 1967.
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