On the tentative role of infectious viruses in tumour etiology.
D000818:Animals; D007938:Leukemia; D007942:Leukemia, Experimental; D009369:Neoplasms; D009522:Newcastle disease virus; D009858:Oncogenic Viruses; D009975:Orthomyxoviridae; D014616:Vaccinia virus; D014777:Virus Diseases
INFLUENZA VIRUSES; LEUKEMIA, EXPERIMENTAL; NEWCASTLE DISEASE VIRUS; TUMOR VIRUSES; VACCINIA VIRUS