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,Elan Valley & Builth Wells : Cwm Elan a Llanfair-ym-Muallt,,Ordnance Survey,1996,"1:50,000 landranger series",,0319222527,,https://cir.nii.ac.jp/crid/1130000796897196160