00347nam a2200109Ia 4500008004100000040001100041100001900052245008400071260005500155300001700210300001000227251112s9999||||xx |||||||||||||| ||und||  aCNCLSA  ajerold A. Last 0aProceedings of the National Academy Of Sciences of the United States of America  c1972bThe National Academy of SciencesaWashington  aP. 2361-3876  bV. 69