TY  - BOOK
AU  - Sawyer,Stephen G.
AU  - Brogan,Darryl K.
ED  - United States.
TI  - A testing procedure for the certification of underground protective cabs and canopies
T2  - Informational report - MESA,
PY  - 1974///
CY  - [Washington]
PB  - U.S. Dept. of the Interior, Mining Enforcement and Safety Administration
KW  - Mine safety
ER  -