TY  - RPRT
TI  - Circular of the Bureau of Standards no. 396: architectural acoustics
AU  - Heyl, Paul R
PY  - 1931
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS CIRC 396
DO  - 10.6028/NBS.CIRC.396
ER  -