TY  - RPRT
TI  - Circular of the Bureau of Standards no. 7 4th edition: pyrometer testing and heat measurements
PY  - 1910
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS CIRC 7e4
DO  - 10.6028/NBS.CIRC.7e4
ER  -