Lampkin, N. (1990). Organic farming (1a. ed.). Farming Press.
Tohutoru Kātū Chicago (17th ed.)Lampkin, Nicolas. Organic Farming. 1a. ed. Ipswich: Farming Press, 1990.
Tohutoro MLA (9th ed.)Lampkin, Nicolas. Organic Farming. 1a. ed. Farming Press, 1990.
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