Tunnel design by rock mass classifications
By: Z.T. Bieniawski ; prepared for Office, Chief of Engineers, U.S. Army under purchase order no. DACW39-78-M-3114 ; monitored by Geotechnical Laboratory, U.S. Army Engineer Waterways Experiment Station.
Contributors: United States. Army. Corps of Engineers.; Geotechnical Laboratory (U.S.).; Pennsylvania State University. Dept. of Mineral Engineering.
Series: Technical report -- GL-79-19.; Technical report (U.S. Army Engineer Waterways Experiment Station) -- GL-79-19.
Publisher: The Station
Published: 1979
Place of publication: Vicksburg, Miss
Language: eng
Subjects: Tunneling.; Rocks -- Classification.; Engineering geology.
Notes: Cover title.

"Final report."

"Pennsylvania State University, Department of Mineral Engineering."

"September 1979."

Includes bibliographical references.