00237nam a2200097Ia 4500008004100000022001400041040001100055245001100066260005200077300001000129251112s9999||||xx |||||||||||||| ||und||  a0028-0836  aCNCLSA 0aNature  c5 May, 1994bMacmillan Journal LimitedaU. S. A  bV.396