Das, Braja M., Principles of geotechnical engineering / Braja M. Das. - 6th ed. - Toronto, Ont., Canada : Thomson, c2006. - xvii, 689 p. : ill. ; 25 cm. ISBN: 0534551440 LCCN: 2005931497 Subjects--Topical Terms: Soil mechanics.Engineering geology. Dewey Class. No.: 624.15136