TY  - RPRT
TI  - Wind resistance of free-tab asphalt shingles 
AU  - Cullen, W C
PY  - 1959
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS RPT 6522
DO  - 10.6028/NBS.RPT.6522
ER  -