00302nam a2200109Ia 4500008004100000040001100041100002300052245004500075260005000120300001300170300000900183251112s9999||||xx |||||||||||||| ||und||  aCNCLSA  aMichael B. Shimkin 0aJournal Of The National Cancer Institute  c1957bThe U. S. Department Of HealthaU. S. A  aP.1-1131  bV.19