000 00356nam a2200121Ia 4500
001 MPKV057790
008 120911s9999 xx 000 0 und d
082 _a500
245 _aScience Vol.190 No.4208-21
_c;
246 _aScience Vol.190 No.4208-21
260 _aWashington
_bAmerican Association for the Advancement of Science
_c1975
650 _aPure Science
999 _c55780
_d55780