Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) AOYAMA Takayoshi,"A Year Climatic study of Hydro-climatological Environment in Yamagata Prefecture, Northeast Japan",Annals of The Tohoku Geographycal Asocciation,03872777,THE TOHOKU GEOGRAPHICAL ASSOCIATION,1986,38,2,132-142,https://cir.nii.ac.jp/crid/1390282680123050112,https://doi.org/10.5190/tga1948.38.132