000 00318nam a2200145Ia 4500
008 160615s9999 xx 000 0 und d
100 _aHASLETT(A W) Ed
245 _aScience news. Vol.22
260 _bPenguin Books
260 _c1951
300 _a128 p.
942 _cBooks
999 _c2287
_d2287