Author:
Title: The 1931 International Code of Signals - American edition. Volume II: For radio signaling
Description: Washington: U.S. Government Printing Office, 1933; 4to (27.5cm), xvii+418pp., dark blue cloth. Used but good copy. Rare. ¶ Sold by the Hydrographic Office under authority of the Secretary of the Navy.

Keywords: communicatie naval history shipping