On the thicknesses of strata in the counties of England and Wales exclusive of rocks older than the permian /
Strahan, Aubrey.
Holmes, T. V.
Dewey, H.
Cunnington, C. H.
Simmons, W. C.
King, W. B. R.
Wray, D. A.
London :  For H.M.S.O., 
1916.