Reilly, Edwin D.. Magnetic core, Milestones in Computer Science and Information Technology, 1 (angol nyelven), Westport, Connecticut, USA: Greenwood Publishing Group, 164/380. o.. ISBN 1573565210, ISBN 9781573565219 (2003. augusztus 30.) „In 1947, Frederick Viehe, an inspector of streets and sidewalks for the Los Angeles, California, Department of Public Works patented a magnetic core memory that he developed in his home laboratory.”
