000 00298nam a2200121Ia 4500
100 _aM C Graw Hill
942 _cBK
245 _aM C Graw Hill year book of science and technilogy
260 _aLondon
_bMc graw hill book co.
_c1976
082 _aR505
_bMYST
300 _a10,436
546 _aEnglish
999 _c333560
_d333560
041 _aeng