title: Activation of a mammary tumour virus in O20 strain mice by x-irradiation and urethane.
mesh_terms: D000818:Animals; D001947:Breeding; D005260:Female; D008325:Mammary Neoplasms, Experimental / Q000209:etiology / Q000382:microbiology*; D008324:Mammary Tumor Virus, Mouse; D051379:Mice / Q000528:radiation effects*; D008854:Microscopy, Electron; D011830:Radiation Effects; D014520:Urethane
chemical_list: D014520:Urethane