000 00355nam a2200121Ia 4500
001 MPKV109205
008 120911s9999 xx 000 0 und d
082 _a500
245 _aScience Vol 235- 236 No. 4793- 4800
_c;
246 _aScience Vol 107
260 _aWashington
_bAmerican Association for the Advancement of Science
_c1987
650 _aPure Science
999 _c72549
_d72549