000 00312nam a2200109Ia 4500
008 220201s1971 xx 000 0 eng d
100 _aMCGRAW HILL ENCYCLOPEDIA OF SCIENCE TECHNOLOGY
245 0 _aENCYCLOPEDIA SCIENCE AND TECHNOLOGY VOL IV
260 _aLONDON
_bMCGRAW HILL
_c1971
300 _a719
942 _2ddc
999 _c89182
_d89182