Atkinson, J. (2007) The mechanics of soils and foundations. 2nd ed. London: Taylor & Francis.
British Standards Institution (no date) Code of practice for site investigations. fourth edition. BS 5930:2015: code of practice for site investigations.
BS 5930:1999+A2:2010 (no date). BSI.
Craig, R.F. and Craig, R.F. (2004) Craig’s soil mechanics. 7th ed. London: Spon Press.
Knappett, J. and Craig, R.F. (2012) Craig’s soil mechanics. 8th ed. London: Spon.
Norbury, D. and ebrary, Inc (2010) Soil and rock description in engineering practice. Dunbeath, Scotland: Whittles Pub. Available at: http://site.ebrary.com/lib/aber/Doc?id=10698308.
Price, M. (1996) Introducing groundwater. 2nd ed. London: Chapman & Hall.
Waltham, T. (1994) Foundations of engineering geology. London: Blackie Academic & Professional.