000 00356nam a2200121Ia 4500
001 MPKV057784
008 120911s9999 xx 000 0 und d
082 _a500
245 _aScience Vol.185 No.4145-50
_c;
246 _aScience Vol.185 No.4145-50
260 _aWashington
_bAmerican Association for the Advancement of Science
_c1974
650 _aPure Science
999 _c55774
_d55774