title: Further studies of avian osteopetrosis virus. 2. Communication.
mesh_terms: D001355:Alpharetrovirus; D000818:Animals; D002642:Chick Embryo; D002645:Chickens; D004372:Ducks; D009500:Neutralization Tests; D010022:Osteopetrosis / Q000382:microbiology* / Q000662:veterinary; D011201:Poultry Diseases / Q000382:microbiology*