@misc{1166821, author = {J E Freiheit}, title = {A modification of the metering-bridge circuits of transmissometer indicators:}, year = {1959}, month = {1959-01-01 05:01:00}, publisher = {, National Institute of Standards and Technology, Gaithersburg, MD}, doi = {https://doi.org/10.6028/NBS.RPT.6407}, language = {en}, }