TY  - RPRT
TI  - an analysis of the responses from an Associated General Contractors of America (AGC) survey of trenching and shoring practices 
AU  - Salomone, Lawrence A
AU  - Yokel, Felix Y
PY  - 1979
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS IR 79-1936
DO  - 10.6028/NBS.IR.79-1936
ER  -