TY  - BOOK
AU  - Palaniappan, S.P. .
TI  - Cropping systems in the tropics : principles and management / 
SN  - 81-224-0667-X
U1  - J:5:3.192 
PY  - 1996///
CY  - New Delhi : 
PB  - New Age International (P) Limited , 
KW  - Cropping
ER  -