International records / UK National Archives
NIGERIA 1:50,000 BAUCHI (D.O.S. 430) : authority for mapping, area of mapping, diagrams, air photography, reports, sales note, general material, map material list, extracts, contracts.
CCS/DOS/296/22 | The Charles Close Society Archives Catalogue.Ordnance Survey International.
No file is held for this record yet. The catalogue entry and the link to where it was published are kept.
