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	1.	Image from Amazon.com	Biological nitrogen fixation in farming systems of the Tropics / [edited by] A. Ayanaba and P. J. Dart. by Ayanaba, A Dart, P. J International Institute of Tropical Agriculture Material type: Text; Format: print ; Literary form: Not fiction Publication details: Chichester ; New York : Wiley, c1977 Availability: Items available for loan: PSAU OLM (2)Call number: C 589 B52 1977, ... Place hold Save to lists Add to cart (remove)
	2.	Image from Amazon.com	Tropical agricultural hydrology : watershed management and land use / [edited by] R. Lal and E. W. Russell. by Lal, R Russell, E. W. (Edward Walter), 1904-1994 International Institute of Tropical Agriculture Material type: Text; Format: print ; Literary form: Not fiction Publication details: Chichester ; New York : J. Wiley, c1981 Availability: Items available for loan: PSAU OLM (2)Call number: C 630.913 T74 1981, ... Place hold Save to lists Add to cart (remove)

Pampanga State Agricultural University