title: Letter: Classification of mouse tumor viruses.
mesh_terms: D000818:Animals; D003593:Cytoplasm / Q000382:microbiology; D004721:Endoplasmic Reticulum / Q000382:microbiology; D017988:Gammaretrovirus / Q000145:classification*; D051379:Mice; D009374:Neoplasms, Experimental / Q000382:microbiology*; D012190:Retroviridae / Q000302:isolation & purification