Sekai no shinrin shigen
Subtitle: mokuzai kikin wa itsumade tsuzuku ka
By: Nihon Ringyō Gijutsu Kyōkai
Series: Ringyō kaisetsu shirīzu -- 18
Publisher: Nihon Ringyō Gijutsu Kyōkai
Published: 1940
Place of publication: Tōkyō
Language: jpn
Number of pages: 32
Subjects: Forest reserves