Kokusai tsūshinsho kaisetsu
By: [chosha Takahashi Isao]
Contributors: Nihon Kaiin Ekisaikai
Edition: Kaitei
Publisher: Nihon Kaiin Ekisaikai
Published: 1939
Place of publication: Tōkyō
Language: jpn
Number of pages: 136
Subjects: Cipher and telegraph codes; Merchant marine; Signaling
Notes: Cover title.