000 00261nam a2200109Ia 4500
008 160710s1942 xx 000 0 und d
100 _aEHERT,W.F. & SPOCK,L.E.
245 _aPHYSICAL SCIENCE
260 _bMCMILLAN & CO.
_c1942
300 _a639
942 _2ddc
_cB
999 _c17862
_d17862