title: The cultivation of rickettsiae in the yolk-sac of developing chick embryos.
authors.forename: D F J
authors.initials: DF
authors.lastname: GREIFF
mesh_terms: D000818:Animals; D002642:Chick Embryo; D047108:Embryonic Development; D012281:Rickettsia / Q000208:ethnology*; D015017:Yolk Sac
keywords: RICKETTSIA/culture