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Worsey, P.N., 1986, The Ouanjitative Assessment of Blast Damage in Highway Rock Cuts and <br /> Tunnel Profiles by Seismic Refraction Surveys, Rock Mechanics and Explosives Research <br /> Center, University of Missouri, Rolla, Missouri, 22 p. <br /> sanjuan\sunny\110361\oct91.Rrt 53 <br /> man simon H`�17DI-H o 8 H H C H <br />