TY  - GEN
AU  - W W Coblentz
AU  - R Stair
C2  - , National Institute of Standards and Technology, Gaithersburg, MD
DA  - 1938-01-01 05:01:00
DO  - https://doi.org/10.6028/NBS.CIRC.421
LA  - en
PB  - , National Institute of Standards and Technology, Gaithersburg, MD
PY  - 1938
TI  - Circular of the Bureau of Standards no. 421::Spectral-transmissive properties and use of colored eye-protective glasses
ER  -