000 00275nam a2200121Ia 4500
008 160710s1946 xx 000 0 und d
082 _a500 SUM
100 _aSUMMER,W.L.
245 _aPROGRESS IN SCIENCE
260 _bBASIL BLACKWELL
_c1946
300 _a176
942 _2ddc
_cB
999 _c6909
_d6909