TY  - BOOK
AU  - Prantilia,Edmundo Barrios
TI  - Economic optimization models of multiple cropping system: applied to the Philippines 
PY  - 1972///
CY  - Ann Arbor, Mich.
PB  - University Microfilms International
KW  - Multiple
KW  - Cropping Systems
KW  - Philippine Islands
N1  - Thesis (Ph.D.) - Iowa State University, 1972
ER  -