TY  - BOOK
AU  - Proctor,Robert V.
AU  - White,Thomas L.
AU  - Terzaghi,Karl
TI  - Rock tunneling with steel supports,
AV  - TF232 .P7
U1  - 625.13 
PY  - 1946///
CY  - Youngstown, O.
PB  - [Commercial Shearing & Stamping Co.]
KW  - Tunneling
KW  - Geology, Structural
KW  - Perfuracao E Desmonte Em Mineracao
KW  - larpcal
KW  - Fundacoes E Escavacoes
N1  - "Source of useful information" at end of first section
UR  - http://www.archive.org/details/rocktunnelingwit00proc
UR  - http://www.openlibrary.org/books/OL6497882M
ER  -