Potts, D G A new universal head unit. [electronic resource] - The American journal of roentgenology, radium therapy, and nuclear medicine Dec 1965 - 957-61 p. digital Publication Type: Journal Article ISSN: 0002-9580 Standard No.: 10.2214/ajr.95.4.957 doi Subjects--Topical Terms: Cerebral Angiography--instrumentationCerebral Ventriculography--instrumentationHumansRadiography--instrumentationTechnology, Radiologic