000 00288nam a2200121Ia 4500
008 220201s1977 xx 000 0 eng d
082 _a620.11
_bNAT
100 N _aNat,DS
245 0 _aMaterials and Metallurgy
260 _bLudhiana:Katson pub house
_c1977
300 _a203
942 _2ddc
999 _c80324
_d80324