Electron microscopic search for retrovirus particles in spontaneous tumors of the parakeet.
D000818:Animals; D009369:Neoplasms / Q000382:microbiology / Q000648:ultrastructure / Q000662:veterinary*; D010240:Parakeets / Q000382:microbiology; D011563:Psittaciformes / Q000382:microbiology; D012190:Retroviridae / Q000648:ultrastructure*