Listeners
Subtitle: the 4th study of the minimum ... "listening areas" of Columbia network stations ... Dealers: the 1st study of the ... "zones of dealer influence" of Columbia network stations
Publisher: Columbia Broadcasting System
Published: 1937
Place of publication: New York]
Language: eng
Subjects: Market surveys
Notes: Microfilm. Vol. 1-2. New York, N.Y., Columbia University Libraries, 1994. 1 microfilm reel, 35 mm.

Filmed; NEH Project (FMEST); 1994.
Table of contents: title: v. 1. Evening.; title: v. 2. Daytime.