00318nam a2200109Ia 4500008004100000040001100041100001600052245006500068260005200133300001300185300001000198251112s9999||||xx |||||||||||||| ||und||  aCNCLSA  aE. E. David 0aSciencebAmerican association for the advancement of science  c7 January, 1972bW. B. Saunders CompanyaLondon  aP.1-1500  bV.175