000 00301nam a2200121Ia 4500
001 MPKV051764
008 120911s9999 xx 000 0 und d
082 _a500
245 _aNature Vol 238
_c;
246 _aNature Vol 238
260 _aLondon
_bMac Millan Journals Ltd.
_c1972
650 _aPure Science
999 _c49767
_d49767