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.
66026753
GB67-19128
Rock mechanics.
Underground construction.
TA706 / .O2
624.15 / OBR
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.
66026753
GB67-19128
Rock mechanics.
Underground construction.
TA706 / .O2
624.15 / OBR