Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) SHIMIZU Katsushi,Regional Differences in the Spread of Potate in the Early Showa era,Proceedings of the General Meeting of the Association of Japanese Geographers,,The Association of Japanese Geographers,2015,2015a,0,100069,https://cir.nii.ac.jp/crid/1390282680671759872,https://doi.org/10.14866/ajg.2015a.0_100069