Hay, R. K. M. (2006). The physiology of crop yield. Oxford: Blackwell Pub.
Trích dẫn kiểu ChicagoHay, Robert K. M. The Physiology of Crop Yield. Oxford: Blackwell Pub, 2006.
Deismireacht MLAHay, Robert K. M. The Physiology of Crop Yield. Oxford: Blackwell Pub, 2006.
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