TY  - RPRT
TI  - Fire endurance tests on walls and plumbing chases containing either metallic or nonmetallic drain waste and vent systems 
AU  - Parker, William J
PY  - 1973
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS IR 74-449
DO  - 10.6028/NBS.IR.74-449
ER  -