@book{546327,
	author = {Johnson, Robert Britten, and DeGraff, Jerome V.},
	title = {Principles of engineering geology /},
	publisher = {Wiley,},
	year = {2014.},
	address = {New York :},
	url = {http://www.loc.gov/catdir/toc/onix04/88005510.html}
}