Müller, F The early origin of vertebral anomalies, as illustrated by a 'butterfly vertebra'. [electronic resource] - Journal of anatomy Dec 1986 - 157-69 p. digital Publication Type: Journal Article; Research Support, U.S. Gov't, P.H.S. ISSN: 0021-8782 Subjects--Topical Terms: Arteries--abnormalitiesCalcification, PhysiologicFetus--anatomy & histologyHumansIntervertebral Disc--embryologyNotochord--anatomy & histologyRadiographyRibs--embryologySpine--blood supplyThoracic Vertebrae--abnormalities