賢治とイーハトーブの「豊穣学」Minoru Sunayama, Shigekazu Ikeda, Akihiko Yamamoto · First published 2013Open the Tome
Dōkyō no kamigami to kyōtenMinoru Sunayama, Masaharu Ozaki, Noritaka Kikuchi · First published 1999Open the Tome
