Ai no genten
Subtitle: yasashisa no bigaku to wa nani ka
By: Ōkawa Ryūhō cho.
Edition: Shohan
Publisher: Kōfuku no Kagaku Shuppan
Published: 1989
Place of publication: Tōkyō
Language: jpn
Number of pages: 190
Subjects: Kōfuku no Kagaku; Happiness -- Religious aspects