000 00366nam a2200145Ia 4500
003 OSt
020 _a070797986
082 _a503
_bMCG/MC
245 _aMc Graw hill encyclopedia of science and technology V.1
_bA-AZO
260 _aNewYork
_bMc Graw Hill Book company
_c1971
300 _a774p.
546 _aEnglish
650 _aGeneral science
942 _2ddc
_cREF
999 _c161627
_d161627