Yūsei jigyō no sōshi to sono jidai
By: Yamamoto Hiroshi, Mutsuzaki Tsunetake, Egami Sadatoshi ; Yūseishō Jinjibu Nōritsuka hen
Series: Kyōyō no sho
Publisher: Tsūshin Kyōiku Shinkōkai
Published: 1951
Place of publication: Tōkyō
Language: jpn
Number of pages: 91
Subjects: Postal service; History