000
00289nam a2200133Ia 4500
008
220421s9999||||xx |||||||||||||| ||und||
040
_a
ET
100
_a
Sharma J.k.
245
0
_a
Operation Research
260
_b
MacMillan
_a
NEW DELHI
300
_a
1172
500
_a
55911
942
_c
BK
999
_c
61924
_d
61924