000 00311nam a2200121Ia 4500
008 160509s9999 xx 000 0 und d
020 _a0028-0836
100 _aNature
245 _aNature : 1981 : Volume 293(Sep-Oct) : Shelf 15.2
260 _bNature Publishing Group
_c1981
300 _a768p.
650 _aNature
999 _c2848
_d2848