@book{30545,
	author = {DErski, W.  and Włodzimierz, Derski.},
	title = {Rock and soil mechanics /},
	publisher = {PWN--Polish Scientific Publishers,},
	year = {c1989.},
	series = {Developments in geotechnical engineering ;},
	address = {New York :},
	note = {Rev. and enl. translation of: Mechanika skał i gruntów, t. 7 of Mechanika techniczna.}
}