Longo, L D Respiratory function of the placenta as determined with carbon monoxide in sheep and dogs. [electronic resource] - The Journal of clinical investigation May 1967 - 812-28 p. digital Publication Type: Journal Article ISSN: 0021-9738 Standard No.: 10.1172/JCI105581 doi Subjects--Topical Terms: AnimalsCarbon MonoxideDogsFemaleMaternal-Fetal ExchangeOxygen ConsumptionPlacenta--metabolismPregnancyPregnancy, AnimalSheep