00353nam a2200109Ia 4500008004100000040001100041100001900052245008400071260006400155300001400219300001000233251112s9999||||xx |||||||||||||| ||und||  aCNCLSA  aJohn T. Edsall 0aProceedings of the National Academy Of Sciences of the United States of America  cJanuary, 1972bThe National Academy of SciencesaWashington  aP. 1-1068  bV. 69