000
00283nam a2200121Ia 4500
008
220201s1997 xx 000 0 eng d
100
_a
KHANNA, O.P.
245
0
_a
T.B. OF WELDING TECHNOLOGY
250
_a
DELHI
260
_a
DELHI
_b
DHANPAT RAI
_c
1997
300
_a
944
942
_2
ddc
999
_c
67171
_d
67171