TY  - BOOK
AU  - Zandstra, H.G.
AU  - Price, E.C.
AU  - Litsinger, J.A.
AU  - Morris, R.A.
TI  - A Methodology for On-Farm Cropping Systems Research
PY  - 1981///
CY  - Los Banos, Laguna, Philippines
PB  - The International Rice Research Institute
ER  -