TY  - BOOK
AU  - "Ramos, Mila Medina comp."
TI  - International bibliography on cropping systems 1977
U1  - "016:631.58(100) ""1977"" L9" 
PY  - 1979///
PB  - "Library and Documentation Centre, IRRI"
KW  - Los Banos
KW  - Cropping systems-Bibliography
ER  -