Old Ordnance Survey Maps.
Great Britain.Ordnance Survey.
Alan Godfrey Maps.
Newcastle upon Tyne : Alan Godfrey Maps,
1996-
Panel title.
Reproductions, at slightly reduced scale, of maps originally issued by the Ordnance Survey at scale 1:2500.
Includes ill., business directory extracts and text describing the history of the areas mapped.
Includes bibliographical references.
Sheet 28.13. Brecon (1903) -- sheet 41.08. Crickhowell & Llangattock (1903) -- sheet 43.14. Gurnos & Ystalyfera (1914) -- sheet 47.07. Brynmawr (1915)