000 00356nam a2200121Ia 4500
001 MPKV057786
008 120911s9999 xx 000 0 und d
082 _a500
245 _aScience Vol.175 No.4017-29
_c;
246 _aScience Vol.175 No.4017-29
260 _aWashington
_bAmerican Association for the Advancement of Science
_c1972
650 _aPure Science
999 _c55776
_d55776