TY  - GEN
AU  - Wilbert F Snyder
C2  - , National Institute of Standards and Technology, Gaithersburg, MD
DA  - 1942-01-01 05:01:00
DO  - https://doi.org/10.6028/NBS.CIRC.439
LA  - en
PB  - , National Institute of Standards and Technology, Gaithersburg, MD
PY  - 1942
TI  - Circular of the Bureau of Standards no. 439::acoustic performance of 16-millimeter sound motion-picture projectors
ER  -