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MLA

Wortmann, C.S, L Lunze, and J Lynch. "Bean Improvement for Low Fertility In Africa (bilfa). Ii. Low Soil Phosphorus Availability." , 66-67.. Print

APA

Wortmann, C., Lunze, L., & Lynch, J. (0000). Bean improvement for low fertility in Africa (BILFA). II. Low soil phosphorus availability.

Chicago

Wortmann, C.S., L Lunze, and J Lynch. "Bean improvement for low fertility in Africa (BILFA). II. Low soil phosphorus availability" (1995): 66-67..