Okamoto Keijirō den
By: [hensansha Abe Kaoru].
Contributors: Abe, Kaoru, b. ca. 1870.
Publisher: Okamoto Keijirō Denki Kankōkai
Published: 1941
Place of publication: Keijō-fu
Language: jpn
Number of pages: 246
Subjects: Okamoto, Keijirō, -- 1867-1938.; Telecommunication -- Japan -- History.; Telecommunication -- Korea -- History.; Government executives -- Japan -- Biography.