000 00320nam a2200121Ia 4500
041 _aEN
082 _a503
_bMCG
100 _aMcGraw Hill, .
245 0 _aMcGraw Hill Encyclopedia of Science & Technology ( APA - BOO ) Vol.2 / McGraw Hill.
260 _bNew Delhi : McGraw Hill ,
_c1992
300 _a720
942 _cBK
999 _c20590
_d20590