TY  - RPRT
TI  - Fire resistance of shutters for moving-stairway openings 
AU  - Mitchell, Nolan D
AU  - Bender, Edward D
AU  - Ryan, James V
PY  - 1952
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS BMS 129
DO  - 10.6028/NBS.BMS.129
ER  -