00537nam a2200133Ia 4500008004100000020001400041040004400055100001600099245013000115260004400245300003000289700006700319999001700386180412s9999||||xx |||||||||||||| ||und||  a851988601  aAhmadu Bello University Library - Zaria  aHorton,  D. 0aMonitoring and evaluating agricultural researchcD. Horton, P. Ballantyne, W. Peterson, B. Uribe, D. Gapasin and K.  Sheridan  aWallingfordbC.A.B. Internationalc1993  axvi, 219p.: ills., tablee  aGapasin, D.;Sheridan, K.;Ballantyne, P.;Uribe, B.;Peterson, W.  c31257d31257