20210207003000.0 Hokkaido chiri gakkai kaiho. 2186-5418 Hokkaido Chiri Gakkai kaiho Japan 2186-5418 2186-5418 Hokkaido chiri gakkai kaiho. 2186-5418 Hokkaido Chiri Gakkai kaiho https://www.jstage.jst.go.jp/browse/hgs1951/list/-char/ja portico Portico 2012/2012 2024-03-26 Preserved : 2012: 1951, 2012: 1952 Preserved : 2012: 1951(1-2, 4-12), 2012: 1952(13-17) Preserved J-STAGE Bulletin of the Hokkaido Geographical Society 2186-5418 2186-5418 internetarchive Internet Archive https://fatcat.wiki/container/ecghjnbtszcrjfirsjzc3hzk2a 1951/1959 2023-09-15 1951-1959 1951 to 1959 Preserved J-STAGE Bulletin of the Hokkaido Geographical Society 2186-5418