@book{10929,
	author = { Patra, Nihar Ranjan.},
	title = {Advance Geotechnological Engineering ( Pdf Lecture Module 18)},
	publisher = {Indian Institute of Technology , Kanpur.},
	address = {IIT Kanpur},
	url = {http://nptel.ac.in/courses/105104132/Module4/lecture18.pdf}
}