APA Citation

Ryan, J. (1991). Fertilizer Use Efficiency Under Rain-Fed Agriculture In West Asia And North Africa.

Chicago Style Citation

Ryan, John. Fertilizer Use Efficiency Under Rain-Fed Agriculture In West Asia And North Africa. 1991.

MLA Citation

Ryan, John. Fertilizer Use Efficiency Under Rain-Fed Agriculture In West Asia And North Africa. 1991.

Warning: These citations may not always be 100% accurate.