TY  - BOOK
AU  - Shaner,W.W.
AU  - W.W.Shaner,P.F.Philipp,W.R.Schmehl ; editorial assistance,Donald E.Zimmerman
TI  - Farming systems research and development:  guidelines for developing countries
SN  - 86531389
U1  - 630.9/S5284/08.3.140 
CY  - #¿NOMBRE?
KW  - AGRICULTURE // DEVELOPING COUNTRIES. AGRICULTURE // RESEARCH // DEVELOPING COUNTRIES. AGRICULTURAL SYSTEMS // RESEARCH // DEVELOPING COUNTRIES. AGRICULTURAL SYSTEMS // DEVELOPING COUNTRIES
ER  -