000 00360nam a2200121Ia 4500
001 MPKV057781
008 120911s9999 xx 000 0 und d
082 _a500
245 _aScience Vol.179 No.4068-4080
_c;
246 _aScience Vol.179 No.4068-4080
260 _aWashington
_bAmerican Association for the Advancement of Science
_c1973
650 _aPure Science
999 _c55771
_d55771