000 00307nam a2200133Ia 4500
008 160710s1950 xx 000 0 und d
082 _a507.2 BEE
100 _aBEELER,NELSON.F
245 _aMORE EXP. IN SCIENCE
250 _a5
260 _bTHOMAS Y CROWELL CO.
_c1950
300 _a176
942 _2ddc
_cB
999 _c19884
_d19884