Hydrogeological map of the Dartford, Kent, District, including parts of hydrometric areas 37, 40 and the London excluded area. Scale ... 1:63,360 /
Day, J. B. W.(John Bartlett Warren)
Bruce, B. A.
Gray, David Alfred.
Mercer, I. F.
Williams, I.
[London] : Institute of Geological Sciences,
1968.
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