Rock tunneling with steel supports /
Proctor, Robert V. 1890-1967.
Rock tunneling with steel supports / by Robert V. Proctor, Thomas L. White ; with an introduction to tunnel geology / by Karl Terzaghi. - Revised, 1968 - Youngstown, Ohio : Commercial Shearing, 1977. - 293 pages : illustrations.
Bibliography: page 99.
Tunneling.
Geology, structural.
624.19
Rock tunneling with steel supports / by Robert V. Proctor, Thomas L. White ; with an introduction to tunnel geology / by Karl Terzaghi. - Revised, 1968 - Youngstown, Ohio : Commercial Shearing, 1977. - 293 pages : illustrations.
Bibliography: page 99.
Tunneling.
Geology, structural.
624.19