000 00318nam a2200145Ia 4500
008 160615s9999 xx 000 0 und d
100 _aHASLETT(A W) Ed
245 _aScience news. Vol.39
260 _bPenguin Books
260 _c1956
300 _a138 p.
942 _cBooks
999 _c2307
_d2307