The sand and gravel resources of the country around Hemel Hempstead, St. Albans and Watford, Hertfordshire description of 1:25000 sheets Th 00, TL 10 and parts of TQ 09 and TQ 19
Harries, W. J. R.
Hollyer, S. E.
Hopson, P. M.
Institute of Geological Sciences (Great Britain)
London HMSO
1982
At head of title: Institute of Geological Sciences
Sand
Gravel