TY - GEN AU - J E Freiheit C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 1959-01-01 05:01:00 DO - https://doi.org/10.6028/NBS.RPT.6407 LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 1959 TI - A modification of the metering-bridge circuits of transmissometer indicators: ER -