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 : Bala a Llyn Efyrnwy,,Ordnance Survey,1984,"1:50,000 landranger series",,0319221253,,https://cir.nii.ac.jp/crid/1130000795922548864