著者名,書名,版表示,出版者名,出版年,シリーズ名,番号,ISBN,ISSN,URL "Kerr, George L.","Practical coal-mining : a manual for managers, under-managers, colliery engineers, and others","6th ed., entirely rev. reset throughout, and enl",C. Griffin,1920,Griffin's mining series,,,,https://cir.nii.ac.jp/crid/1130282271306152192