Gupta, B.L. Textbook of road, railway, bribge and tunnel engineering / Roads, railways, bridges and tunnel engineering. B.L. Gupta and Amit Gupta. - New Dehli : Standard Publishers, 1991. - xxi, 1060 p. ; 24 cm. Includes bibliographical references . Subjects--Topical Terms: Tunnel Engineering. LC Class. No.: TH625 / GUP