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
Great Britain. Ordnance Survey,"Bala and Lake Vyrnwy, Berwyn : Bala a Llyn Efyrnwy",,Ordnance Survey,1996,"1:50,000 landranger series",,031922242X,,https://cir.nii.ac.jp/crid/1130000796966123648