000 00360nam a2200157Ia 4500
008 200208s9999 xx 000 0 und d
082 _aGL 793.8
100 _a"Perelman, Ya"
245 0 _aPhysics for entertainment
260 _aMuscow
260 _bMir Publishers
260 _c1972
300 _av.p
650 _aScientific recreations
942 _cB
999 _c194915
_d194915