title: [PRODUCTION OF RIVALTA-POSITIVE SUBSTANCES IN ALLANTOIC FLUID OF THE CHICK EMBRYO BY SOME MYXOVIRUSES].
mesh_terms: D000818:Animals; D002642:Chick Embryo; D049033:Chorioallantoic Membrane; D005122:Exudates and Transudates; D009522:Newcastle disease virus; D009975:Orthomyxoviridae; D012106:Research
keywords: CHICK EMBRYO; EXPERIMENTAL LAB STUDY; EXUDATES AND TRANSUDATES; INFLUENZA VIRUSES; NEWCASTLE DISEASE VIRUS
vernacular_title: PRODUZIONE DI SOSTANZE RIVALTA-POSITIVE IN LIQUIDO ALLANTOIDEO DI UOVA EMBRIONATE DI POLLO AD OPERA DI ALCUNI MIXOVIRUS.