International records / UK National Archives
NIGERIA 1:25,000 - 1:50,000 DELTA (Duo Scale), (D.O.S. 330, 430) :. authority for mapping, area of mapping, general material, agreed procedure with Shell B.P., diagrams, lists, information, map material list, articles, sheet index & sizes, vegetation classification.
CCS/DOS/296/15 | 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.
