ISBN 9784762019807 books & textbook
Doitsu no kyushokusha kiso hosho : Harutsu 4 ni yoru seido no shikumi to un'yo.
Brigitte Steck; Michael Kossens; Yoichi Tabata
Gakubunsha. /2009-08-01 Tankobon Hardcover
isbn-10: 4762019801 / isbn-13: 9784762019807
