ISBN 9784765534055 books & textbook
Ryūikiken puranningu no jidai : Shizen kyōseigata ryūikiken toshi no saisei
Mikiko Ishikawa; Yūji Kishi; Katsuhide Yoshikawa
Tōkyō : Gihōdō Shuppan, 2005. /2005-03-01 Tankobon Softcover
isbn-10: 4765534057 / isbn-13: 9784765534055