Excursion to Twyford and the Wargrave Outlier
Tài liệu tham khảo
New 1-inch Ordnance Maps, Sheets 254–5, 268–9.
Geological Survey Map, Sheet 7 (Drift).
Whitaker, 1889, Geology of London, Mem. Geol. Survey., Vol. i, 552
Whitaker, 1889, Geology of London, Mem. Geol. Survey., Vol. i, 555
Prestwich, 1890, On the Relations of the Westleton Beds, etc, Quart. Journ. Geol. Soc., vol. xlvi, 141
Blake, 1891, Report and Proc. Reading Lit. and Scientific Soc., 28
White, 1892, Notes on the Westleton Beds near Henley, Proc. Geol. Assoc., vol. xii, 379, 10.1016/S0016-7878(92)80020-2
Monckton, 1893, On the Occurrence of Boulders and Pebbles from Glacial Drift, etc, Quart. Journ. Geol Soc., vol. xlix, 315
Shrubsole, 1898, On High Level Gravels in Berks. and Oxon, Quart. Journ. Geol. Soc., vol. liv, 587