The documents (which comprise 30,000 pages) were initially microfilmed, and the monochrome microfilm later digitized. The Genealogy Collection includes microfilmed and indexed Memphis and Shelby County records. Approximately 1,050 titles of periodicals (ca 370,000 pages) were microfilmed by 2012. All of his unpublished musical manuscripts were eventually microfilmed. The microfilmed census is available in rolls from the National Archives and Records Administration. In 1955, the paper census schedules were destroyed after the population schedules were microfilmed. Several organizations also host images of the microfilmed census online, and digital indices. Several organizations also host images of the microfilmed census online, along which digital indices. This material has been microfilmed by University Publications of America. The materials were microfilmed and returned to the family. The microfilmed score was flown to Tehran and travelled to the West in April 1942. Dietrich passes along his microfilmed credentials as a Nazi agent to the FBI.