[Monthly. This number is the 1st supplement to Commercial and Government radio stations, edition June 30, 1923, which has not yet been issued.]
Notes:
[Monthly. This number is the 1st supplement to Commercial and Government radio stations, edition June 30, 1923, which has not yet been issued.] * For Sale by Superintendent of Documents. Paper, 5c. single copy, 25c. a yr.; foreign subscription, 40c.
Availability:
* For Sale by Superintendent of Documents. Paper, 5c. single copy, 25c. a yr.; foreign subscription, 40c.