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
United Nations. Dept. of International Economic and Social Affairs,"World population monitoring 1989 : special report, the population situation in the least developed countries",,United Nations,1990,Population studies,,9211511860,,https://cir.nii.ac.jp/crid/1130282273329500288