000
00275nam a2200133Ia 4500
100
_a
Koller A
942
_c
BK
654
_a
efficiency
245
_a
Work power & efficiency
260
_b
Wiley eastern
_a
New Delhi
_c
1989
300
_a
66
546
_a
ENGLISH
999
_c
27079
_d
27079