000
00263 a2200121 4500
000
nam a22 7a 4500
020
_a
9788121902816
100
_a
PK Gupta and D.S Hira
245
_a
Operation Reserch
250
_a
7
260
_b
S Chand
_c
1976
942
_c
BK
999
_c
117994
_d
117994