00321nam a2200097Ia 4500008004100000040001100041245008400052260006400136300001400200300000900214251112s9999||||xx |||||||||||||| ||und||  aCNCLSA 0aProceedings of the National Academy Of Sciences of the United States of America  cJanuary, 1980bThe National Academy of SciencesaWashington  aP. 1-2354  bV.14