Brinker, Russell C., and Roy Minnick. 1987. The Surveying Handbook. Van Nostrand Reinhold.
‘British Geological Survey (BGS)’. n.d.
Grotzinger, John P., and Thomas H. Jordan. 2014. Understanding Earth. 7th edition. W.H. Freeman and Company, a Macmillan Higher Education Company.
Kavanagh, Barry F., and Tom B. Mastin. 2014. Surveying: Principles and Applications. Ninth edition, International edition. Pearson.
Knappett, Jonathan, and R. F. Craig. 2012. Craig’s Soil Mechanics. 8th ed. Spon. http://lib.myilibrary.com/browse/open.asp?id=352526&entityid=https://idp.brunel.ac.uk/entity.
Minnick, Roy. 1995. The Surveying Handbook: [Volume I]. Second edition. Edited by Russell C. Brinker. Springer Science+Business Media, B.V.
Smithson, Peter, Kenneth Addison, and K. Atkinson. 2008. Fundamentals of the Physical Environment. 4th edn. Routledge. http://lib.myilibrary.com/browse/open.asp?id=460015&entityid=https://idp.brunel.ac.uk/entity.
‘U.S. Geological Survey’. n.d.
Waltham, Tony. 2009. Foundations of Engineering Geology. 3rd ed. Spon Press.