Geological Survey of Great Britain. Great Britain. Geological Survey of England and Wales. Sheet 289 solid and drift. Great Britain. Ordnance Survey of England. Companion text: Geology of the country around Canterbury and Folkestone. (Combined memoir in explanation of One-inch Geological sheets 289, 305 and 306, New Series) / by J.G.O. Smart, G. Bisson, and B.C. Worssam, with chapters on palaeontology of the Gault, by R. Casey, and on palaeontology of the Chalk, by R.V. Melville, and other contributions by P.A. Sabine ... [et al.]. London: Her Majesty Stationary Office. Natural Environment Research Coucil. Memoirs of the Geological Survey of Great Britain England and Wales. 1966. 337p. North Decimal Degree 51.300000. South Decimal Degree 51.1167. East Decimal Degree 1.2333. West Decimal Degree 0.8167. In upper left margin: Ordnance Survey of Great Britain. Relief shown by contour interval and spot heights. Transverse Mercator projection. National grid system. "Original geological survey on the one-inch scale by W. B. Dawkins et al. Published on Sheet 3 Old Series in 1868; new edition showing post-Tertiary deposits in 1875, revised in 1889. Resurveyed on the six-inch scale: a small tract in the north-west by J.R. Earp in 1938; the remainder by J. G. O. Smart, et al between 1948 and 1955.".