ISBN 9784840440547 books & textbook
Chonyumon nokekkannai chiryo : Tekunikku no konkyo to jissai ga wakaru : Kaiwa keishiki de shugi no pointo o tettei rikai.
Medikashuppan. /2012-05-01 Tankobon Hardcover
isbn-10: 4840440549 / isbn-13: 9784840440547