REAGAN, R L Electron micrographs of Newcastle disease virus propagated in the cotton rat (Sigmodon hispidus). [electronic resource] - American journal of veterinary research Oct 1952 - 575-6 p. digital Publication Type: Journal Article ISSN: 0002-9645 Subjects--Topical Terms: AnimalsElectronsMicroscopyNewcastle DiseaseNewcastle disease virusRatsReproductionSigmodontinae