Great Britain: electricity, statutory supply areas.
Great Britain.Ministry of Town and Country Planning
Great Britain.Ordnance Survey.
[Chessington] : Ordnance Survey,
1946.
"4000/7/46.Ch.".
"Compiled by the Ministry of Town and Country Plannning and the Department of Health for Scotland, from information in the possession of the Electricity Commissioners and the North of Scotland Hydro-Electric Board."
Insets: Orkney *& Shetland
National atlas of Great Britain.