000 00353nam a2200121Ia 4500
001 MPKV109208
008 120911s9999 xx 000 0 und d
082 _a500
245 _aScience Vol 237- 238 No. 4819-4827
_c;
246 _aScience Vol 107
260 _aWashington
_bAmerican Association for the Advancement of Science
_c1987
650 _aPure Science
999 _c72552
_d72552