TY  - BOOK
AU  - Francis,Charles A  .
TI  - Multiple cropping systems / 
SN  - 0029486106
U1  - 631.58 
PY  - 1986///
CY  - London : 
PB  - Macmillan press , 
KW  - MULTIPLE CROPPING SYSTEMS
N1  - Includes index
ER  -