00273nam a2200097Ia 4500008004100000040001100041245004500052260005700097300001200154300000900166251112s9999||||xx |||||||||||||| ||und||  aCNCLSA 0aJournal Of The National Cancer Institute  cJanuary, 1982bNational Institute Of HealthaU. S. A  aP.1-600  bV.67