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long-playing records

 Subject
Subject Source: Art & Architecture Thesaurus
Scope Note: Phonograph records originally invented by Columbia Records, first introduced in 1948. The records have a rotational speed of 33 1/3 rpm (revolutions per minute), and have very fine grooves. They, along with 45 rpm records, replaced 78 rpm records in popularity.

Found in 1 Collection or Record:

Leon H. Keyserling papers

 Collection
Identifier: Mss 1052
Abstract Letters, correspondence, writings, testimonies, and audiovisual recordings of Leon Hirsch Keyserling (1908-1987), American economist, chairman of the Council of Economic Advisers under President Harry S. Truman, lawyer, and founder and president of the Conference on Economic Progress (CEP). Materials primarily relate to Keyserling's professional life as a private consulting economist, especially to members and committees of Congress, as a practicing attorney, and with his nonprofit...
Dates: 1918-1990