000 00356nam a2200121Ia 4500
001 MPKV057789
008 120911s9999 xx 000 0 und d
082 _a500
245 _aScience Vol.176 No.4030-42
_c;
246 _aScience Vol.176 No.4030-42
260 _aWashington
_bAmerican Association for the Advancement of Science
_c1972
650 _aPure Science
999 _c55779
_d55779