1. ALCOCK M. /1973/: A survey of ochrous land drainage sites in England and Wales. Min. of Ag., Fisheries & Food, Field Drainage Experimental Unit, Tech. Bull. 73.2, 1–7.
2. ANDREWS G.H.—KLASSELL J.A. /1964/: Cylinder pile retaining wall. Highway Research Record, No. 56, 83–97.
3. ANON /1965/: Cliff stabilisation scheme. East Cliff, Bournemouth, being protected with sand drains. The Survey or and Municipal Engineer, 125, /2 January/, 25.
4. AYRES D.J. /1961/ The treatment of unstable slopes and railway track formations. Trans. Soc. of Engrs., 52, 111–138.
5. BAKER R.F.—MARSHALL H.C. /1958/: Control and correction —In: Landslides and engineering practice. /ed. E.B. Eckel/, 150–188. Highway Research Board Special Report 29.