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
"Geological Survey (South Africa) and Geological Survey (Namibia) and Heil, A. C.",Mariental,,Government Printer,1980,Geologiese reeks : 1:250 000 = Geological series : 1:250 000,,0621061107,,https://cir.nii.ac.jp/crid/1130000794176566784