HALL, E J ON THE SPECIFICATION OF FIELD SIZE FOR TELECOBALT UNITS. [electronic resource] - The American journal of roentgenology, radium therapy, and nuclear medicine Jul 1964 - 207-12 p. digital Publication Type: Journal Article ISSN: 0002-9580 Subjects--Topical Terms: Cobalt IsotopesEquipment and SuppliesRadioisotope TeletherapyRadiologyRadiotherapy DosageTechnologyTechnology, Radiologic