Wiebers, U. (1992). Economic and environmental effects of pest management information and pesticides: The case of processing tomatoes in California. s.n.].
Παραπομπή σε μορφή Chicago (17η εκδ.)Wiebers, Uwe-Carsten. Economic and Environmental Effects of Pest Management Information and Pesticides: The Case of Processing Tomatoes in California. [S.l.: s.n.], 1992.
Παραπομπή σε μορφή MLA (8th εκδ.)Wiebers, Uwe-Carsten. Economic and Environmental Effects of Pest Management Information and Pesticides: The Case of Processing Tomatoes in California. s.n.], 1992.
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