絵はがき（徳島県那賀川総合開発事業坂洲発電所竣工記念）１ : 那賀川総合開発事業計画 一般平面図 縦断面 絵はがき（徳島県那賀川総合開発事業坂洲発電所竣工記念）１ : 那賀川総合開発事業計画 一般平面図 縦断面エハガキ（トクシマケンナカガワソウゴウカイハツジギョウサカシュウハツデンショシュンコウキネン）１

National Diet Library

The National Diet Library (NDL), founded in 1948, is the library which belongs to the Diet. The NDL assists the activities of the National Diet. The Library collects and conserves materials and information both from Japan and abroad, serving as a foundation of knowledge and culture and providing library services to administrative and judicial entities and Japanese citizens.