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
"Corvinus, Friedemann and Grenzebach, Klaus","Bevölkerungsgeographie, Westafrika (Nigeria, Kamerun) = Population geography, West Africa (Nigeria, Cameroon) = Géographie de la population, Afrique occidentale (Nigéria, Cameroun) : 4°-8° N, 3°15´-9°30´ E",,Gebrüder Borntraeger,1984,Afrika-Kartenwerk,,3443283128,,https://cir.nii.ac.jp/crid/1130000795717866752