TY  - BOOK
AU  - YASPAN, ARTHUR,FRIEDMAN, LAWRENCE,SASIEN, MAURICE
TI  - OPERATIONS RESEARCH METHODS AND PROBLEMS
SN  - 0-471-75471-4
U1  - 658.4084 SAS'O 
PY  - 1959///
CY  - NEWYORK
PB  - JOHN WILEY
ER  -