1. Barnouw, E., op. cit., p.91.
2. Barnouw, E., op. cit., p.105. While as many as 1,000 individual stations may have taken to the air at one time or another, the number broadcasting at any given moment thereafter, seemed to have stabilised at about 550 - eg., at the end of August 1924, the official government count was 537. "Broadcasting Stations Now Total 537", Sunday New York Times, 21 September 1923, Section 8, p. 17.