TY  - RPRT
TI  - Criteria for substitute duct materials 
AU  - McDorman, O N
AU  - Hutton, A C
AU  - Achenbach, PR
PY  - 1953
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS RPT 2540
DO  - 10.6028/NBS.RPT.2540
ER  -