00289nam a2200097Ia 4500008004100000040001100041245008000052260003500132300001500167300000900182251112s9999||||xx |||||||||||||| ||und||  aCNCLSA 0aProceedings Of National Academy of Sciences of The United States Of America  c1987bPergamon PressaNew York  aP.901-1726  bV.84