Geology of the country around Canterbury and Folkestone
by J.G.O. Smart, G. Bisson, and B.C. Worssam
(Memoirs of the geological survey of Great Britain, England and Wales)(Explanation of one-inch geological sheet, 289,
H.M.S.O., 1966
At head of title: Natural Environment Research Council
Bibliography: p. 304-314
H.M. Stationery Off.