00331nam a2200121Ia 4500008004100000022001400041040001100055100001600066245005200082260005100134300001300185300001100198251112s9999||||xx |||||||||||||| ||und||  a0028-0836  aCNCLSA  aJohn Maddox 0aNaturebInternational Weekly Journal of Science  cJuly 2-8, 1987bMacmillan Magazines LtdaU.S.A  aP. 1-840  bV. 328