Sōgōteki na un'yu sābisu kyōkyū suijun no hikaku shihyō no kaihatsu ni kansuru chōsa hōkokusho
Series: Un'yu keizai kenkyū shiryō
Publisher: Un'yu Keizai Kenkyū Sentā
Published: 1992
Place of publication: Tōkyō
Language: jpn
Number of pages: 90