Calcium montmorillonite (fuller's earth) in the Lower Greensand of the Baulking area, Berkshire /
E. G. Poole and B. Kelk.
- London: Her Majesty's Stationery Office, 1971.
- viii, 56 p. : maps, tables ; 30 cm.
- Institute of Geological Sciences : Natural Environment Research Council. 71/4 .