Kanada ni okeru seisan iin kaigi no jissai
By: Rōdōshō Rōseikyoku Rōdō Kyōikuka
Series: Rōdō mondai sōsho -- dai 17-shū
Publisher: Rōdōshō Rōseikyoku Rōdō Kyōikuka
Published: 1950
Place of publication: Tōkyō
Language: jpn
Number of pages: 141