Smith, R. J. (1950). Tree crops: A permanent agriculture. Dovin-Adair Co.
Chicago Style aipamenaSmith, Russell J. Tree Crops: A Permanent Agriculture. U S A: Dovin-Adair Co, 1950.
MLA aipamenaSmith, Russell J. Tree Crops: A Permanent Agriculture. Dovin-Adair Co, 1950.
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