000
00253nam a2200109Ia 4500
008
220201s1962 xx 000 0 eng d
100
_a
Tara Chand
245
0
_a
Engg economics
260
_b
Roorkee : New Chand Bros
_c
1962
300
_a
563
942
_2
ddc
999
_c
71995
_d
71995