DeGregori, T. R. (2004). Origins of the organic agriculture debate. Blackwell.
Tohutoru Kātū Chicago (17th ed.)DeGregori, Thomas R. Origins of the Organic Agriculture Debate. Iowa City: Blackwell, 2004.
Tohutoro MLA (9th ed.)DeGregori, Thomas R. Origins of the Organic Agriculture Debate. Blackwell, 2004.
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