20-nen no ayumi
Publisher: Hokkaidō Kōgai Bōshi Kenkyūjo
Published: 1990
Place of publication: Sapporo-shi
Language: jpn
Number of pages: 107
Subjects: Environmental policy; History; Hokkaidō Kōgai Bōshi Kenkyūjo
Other titles: Nijūnen no ayumi.
Notes: Includes list of the Institute's publications.