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 South Africa. Directorate of Surveys and Mapping,Barberton,3rd ed.,"Chief Directorate, Surveys and Mapping",1984,1:250 000 geological series = 1:250 000 geologies reeks,,,,https://cir.nii.ac.jp/crid/1130282270348672768