TY  - BOOK
AU  - Nicolai Siemens
AU  -  C. H Marting  Frank Greenwood
TI  - Operations Research : Planning Operating and Information Systems
U1  - 519.92 
PY  - 1973///
CY  - New York
PB  - Free Press
N1  - Nicolai Siemens; C. H Marting & Frank Greenwood: Operations Research : Planning Operating and Information Systems.  New York.  Free Press, 1973.--(519.92SIE)
ER  -