Author,Title,Edition,Publisher,Year,Series,Number,ISBN,ISSN,URL 商工省地質調査所,"長野縣長野油田地形及地質圖 = Topographical and geological map of the Nagano oil field, Nagano prefecture",,"[商工省地質調査所],地學協會",1938,大日本帝國油田 = The oil field of the Japanese Empire,,,,https://cir.nii.ac.jp/crid/1130282273032381824