title: Electron microscopic observations on a "C"-type virus in cell cultures derived from a tumor-bearing viper.
mesh_terms: D000818:Animals; D000836:Animals, Zoo; D046508:Culture Techniques; D008854:Microscopy, Electron; D009232:Myxoma / Q000382:microbiology / Q000662:veterinary; D012703:Serotyping; D012911:Snakes; D013154:Spleen / Q000382:microbiology*; D014713:Viruses, Unclassified / Q000145:classification / Q000302:isolation & purification*