000
00259nam a2200109Ia 4500
008
220201s1978 xx 000 0 eng d
082
_a
620.11
_b
NAT
100
_a
Nat, DS
245
0
_a
Materials & metallurgy
260
_b
Ludhiyana: Katson
_c
1978
942
_2
ddc
999
_c
80672
_d
80672