International Symposium on underground engineering : 14-17 April, 1988, New Delhi, India : proceedings / B. SinghInternational Symposium on underground engineering : 14-17 April, 1988, New Delhi, India : proceedings / B. SinghLand subsidence : international symposium, 11-15 December, 1989 / ed.: B. Singh, N.C. SaxenaBlasting in ground excavations and mines / B. Singh ... [et al.]Synchrotron-based techniques in soils and sediments / ed. by Balwant Singh & Markus GräfeSynchrotron-based techniques in soils and sediments / ed. by Balwant Singh & Markus Gräfe