00319nam a2200109Ia 4500008004100000040001100041100001900052245008400071260002700155300001700182300001000199251112s9999||||xx |||||||||||||| ||und||  aCNCLSA  aJerold A. Last 0aProceedings of the National Academy Of Sciences of the United States of America  cSeptember, 1971aU.S.A  aP. 1993-3272  bV. 66