I. S. RAVDIN--CIVILIAN ACTIVITIES AT THE NATIONAL LEVEL.
D013502:General Surgery; D049673:History, 20th Century; D009369:Neoplasms; D011634:Public Health; D012106:Research; D014481:United States; D014837:Voluntary Health Agencies
BIOGRAPHIES; HISTORY; NEOPLASMS; PUBLIC HEALTH; RESEARCH; SURGERY; UNITED STATES; VOLUNTARY HEALTH AGENCIES