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
"Flagg, Grace L. (Grace Lillian) and Longmore, Thomas Wilson",Trends in rural and urban levels of living,,"Bureau of Agricultural Economics, U.S. Dept. of Agriculture",1949,Agriculture information bulletin,,,,https://cir.nii.ac.jp/crid/1130000794120830592