A preliminary study of certain methods of determining the listening audience of radio stations
Subtitle: Prepared for the National Broadcasting Company
Contributors: National Broadcasting Company
Published: 1940
Place of publication: [Place of publication not identified]
Language: eng
Number of pages: 72
Subjects: Radio audiences
Notes: Microfilm. New York, N.Y. : Columbia University Libraries, 2018. 1 microfilm reel ; 35 mm. Master negative: 2018-10004. No. 5 on a reel of 10 titles.