00521nam a2200145Ia 4500082002600000100008200026110002800108245010800136260003900244300001400283490004100297490002500338500000500363856000700368  a519.50246144bUn58.EA  aUnited States. Health, Education and Welfare, Deptartment of-Washington, D.C.  aHaenszel, William ; ed.  aEpidemiological approaches to the study of cancer and other chronic diseasesbcEd. by William Haenszel  aWashington, D. C.bThe Auth.cn.d.  axi, 465p.  aNational Cancer Institute monograph   ano. 19, January 1966  a  df