00353nam a2200109Ia 4500008004100000040001100041100002500052245008400077260005500161300001700216300001000233251112s9999||||xx |||||||||||||| ||und||  aCNCLSA  aPatricia Zeis Thomas 0aProceedings of the National Academy Of Sciences of the United States of America  c1975bThe National Academy of SciencesaWashington  aP. 1649-3262  bV. 72