00265nam a2200109Ia 4500008004100000022001400041040001100055245001100066260005600077300001200133300001000145251112s9999||||xx |||||||||||||| ||und||  a0028-0836  aCNCLSA 0aNature  c2 January, 1992bMacmillan Journal LimitedaU. S. A  aP.1-480  bV.355