[1]
Brinker, R.C. and Minnick, R. 1987. The surveying handbook. Van Nostrand Reinhold.
[2]
British geological survey (BGS): .
[3]
Grotzinger, J.P. and Jordan, T.H. 2014. Understanding Earth. W.H. Freeman and Company, a Macmillan Higher Education Company.
[4]
Kavanagh, B.F. and Mastin, T.B. 2014. Surveying: principles and applications. Pearson.
[5]
Knappett, J. and Craig, R.F. 2012. Craig’s soil mechanics. Spon.
[6]
Minnick, R. 1995. The surveying handbook: [Volume I]. Springer Science+Business Media, B.V.
[7]
Smithson, P. et al. 2008. Fundamentals of the physical environment. Routledge.
[8]
U.S. geological survey: .
[9]
Waltham, T. 2009. Foundations of engineering geology. Spon Press.
