title: Studies on induction of virus from adenovirus and SV40 hamster tumors 2. "Helper" viruses.
mesh_terms: D000256:Adenoviridae / Q000302:isolation & purification*; D000818:Animals; D046508:Culture Techniques; D009374:Neoplasms, Experimental; D012087:Reoviridae; D012136:Respiratory Syncytial Viruses; D013539:Simian virus 40