TY  - RPRT
TI  - Proceedings, Federal Workshop on Excavation Safety, September 19 and 20, 1978 
AU  - Salomone, Lawrence A
AU  - Yokel, Felix Y
PY  - 1979
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS IR 79-1935
DO  - 10.6028/NBS.IR.79-1935
ER  -