For use in training conscripted men for service as radio and buzzer operators (international code) in the United States Army
By: Issued by the Federal Board for Vocational Education, Washington. October, 1917
Series: Bulletin -- no. 2; Bulletin (United States. Federal Board for Vocational Education) -- no. 2.
Publisher: Govt. Print. Off.
Published: 1918
Place of publication: Washington
Language: eng
Number of pages: 14
Subjects: Wireless Telegraph
Notes: "Reprint of Circulars of information no. 1."

"Reprinted March, 1918; reprinted July, 1918."