Morse code
Subtitle: learning and practice
By: by R. G. Shackel, M.A.
Publisher: Longmans Green and Co.
Published: 1942
Place of publication: London; New York, [etc.]
Language: eng
Number of pages: 64
Subjects: Telegraph -- Operators' manuals.; Cipher and telegraph codes.
Notes: "First published 1941 ... New edition 1942, fifth impression 1942."
"Barred letters" on p. [3] of cover.