History of the Bioassay Program of the National Cancer Institute.
D000818:Animals; D001681:Biological Assay; D002273:Carcinogens; D049673:History, 20th Century; D009316:National Institutes of Health (U.S.) / Q000266:history*; D009374:Neoplasms, Experimental / Q000139:chemically induced*; D014481:United States
D002273:Carcinogens