00315nam a2200097Ia 4500008004100000040001100041245008400052260005700136300001500193300000900208251112s9999||||xx |||||||||||||| ||und||  aCNCLSA 0aProceedings Of The National Academy Of Sciences Of The United States Of America  cFebruary, 1984bNational Academy Of ScienceaU. S. A  aP.983-2274  bV.81