@book{7ecced72179348a8aecb7dacba91d39c,
title = "Geology of the Builth Wells District - a brief explanation of the geological map. Sheet Explanation of the British Geological Survey. 1:50'000 Sheet 196 Builth Wells (England and Wales)",
author = "D Schofield and Jeremy Davies and R Waters and P Wilby and M Williams and D Wilson",
year = "2004",
language = "English",
series = "Sheet Explanation of the British geological Survey",
publisher = "British Geological Survey",
address = "United Kingdom of Great Britain and Northern Ireland",
}