TY  - RPRT
TI  - Fire endurance of gypsum board walls and chases containing plastic and metallic drain, waste and vent plumbing systems 
AU  - Parker, W J
AU  - Paabo, M
AU  - Scott, J T
AU  - Gross, D
AU  - Benjamin, I A
PY  - 1975
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS BSS 72
DO  - 10.6028/NBS.BSS.72
ER  -