TY  - RPRT
TI  - A study of work practices employed to protect workers in trenches 
AU  - Hinze, Jimmie
AU  - Carino, Nicholas J
PY  - 1980
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS IR 80-1988
DO  - 10.6028/NBS.IR.80-1988
ER  -