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 "Haggerty, Richard A. and Library of Congress. Federal Research Division","El Salvador, a country study",2nd ed,"The Division : For sale by the Supt. of Docs., U.S. G.P.O.",1990,Area handbook series,,,,https://cir.nii.ac.jp/crid/1130000795067046400