TY  - BOOK
AU  - H G ZANDSTRA
TI  - A METHODOLOGY FOR ON-FRAM CROPPING SYSTEMS RESEARCH
U1  - P631.58Z16M 
PY  - 1981///
CY  - LOS BOUNOS
PB  - INTERNATIONAL RICE REASEARCH INSTITUE
KW  - A METHODOLOGY FOR ON-FRAM CROPPING SYSTEMS RESEARCH
ER  -