Oriental improved code
Subtitle: (3-letter system)
By: compiled by K. Yamaguchi.
Contributors: Yamaguchi, K.
Edition: Postwar ed.
Publisher: Oriental Pub. Co.
Published: 1953
Place of publication: Osaka
Language: eng
Number of pages: 366
Subjects: Cipher and telegraph codes.
Notes: Rev. ed. of: Oriental self-checking three-letter code. 1930.