TY  - BOOK
AU  - Chopra M G
AU  -  Ram Kumar
TI  - Fortran iv programming
U1  - X:(D6,9(B), M0 
PY  - 1980///
CY  -  New Delhi 
PB  - Vikas Publishing India       
KW  - Operations Rersearch Economics
N1  - Appendix p230-36
ER  -