00334nam a2200109Ia 4500008004100000022001400041040001100055100001800066245008400084260004700168300000900215251112s9999||||xx |||||||||||||| ||und||  a0027-8424  aCNCLSA  aJames Darnell 0aProceedings Of The National Academy Of Sciences Of The United States Of America  c1993bThe National Academy Of ScienceaUSA  bV.96