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: Ci20
: Geological Maps & Plans
: Map
: Geological Survey England and Wales: No. 34
: Map showing the geology of an area from Chippenham, Tetbury, Cirencester, Swindon, Marlborough Downs.
: Winwood
: Geological Survey
: 1857
: Murchison, R I.: area from Chippenham, Tetbury, Cirencester, Swindon, Marlborough Downs.
: 1857