000 00350nam a2200121Ia 4500
001 MPKV109200
008 120911s9999 xx 000 0 und d
082 _a500
245 _aScience Vol 233 No. 4767 -4772
_c;
246 _aScience Vol 107
260 _aWashington
_bAmerican Association for the Advancement of Science
_c1986
650 _aPure Science
999 _c72544
_d72544