000
00301nam a2200145Ia 4500
100
_a
Gupta/R.S
490
_v
TM9
942
_c
BK
654
_a
work study
245
_a
Work Study
260
_b
National Productivity council
_a
New Delhi
_c
1988
300
_a
247
546
_a
ENGLISH
999
_c
20406
_d
20406