TY  - RPRT
TI  - A new approach to roof system design 
AU  - Cullen, William C
AU  - Boone, Thomas H
PY  - 1965
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS report ; 8632
DO  - 10.6028/NBS.RPT.8632
ER  -