000 00304nam a2200133Ia 4500
008 210901s1972 xx 000 0 eng d
082 _a530 ASI
100 _aASIMOV
245 0 _aUnderstanding physics
260 _aNew York
_bNew American
_c1972
300 _a249
650 _aPhysics
942 _2ddc
_cBK
999 _c9049
_d9049