00906cam a22002891 4500 9876238 BD-DhUL 20150114100725.0 750501s1967 nyua b 000 0 eng 66026753 GB67-19128 (OCoLC)1308447 DLC OTU OCoLC Uk DLC BD-DhUL premarc TA706 .O2 624.15 OBR Obert, Leonard, 1906- Rock mechanics and the design of structures in rock / by Leonard Obert [and] Wilbur I. Duvall. New York : Wiley ; c1967. xix, 650 p. : illus. ; 24 cm. Includes bibliographical references and index. Rock mechanics. Underground construction. Duvall, Wilbur I., joint author. 7 cbc oclcrpl u ncip 19 y-gencatlg ddc BK 30646 30646 0 0 ddc 0 624_150000000000000_OBR 0 NFIC 57972 DUSL DUSL GEN 2015-01-14 624.15 OBR A113310 2015-01-14 2015-01-14 BK