TY - GEN AU - Grantham, R E AU - Freeman, J J C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 1948-01-01 05:01:00 DO - https://doi.org/10.6028/NBS.CRPL.9-8 LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 1948 TI - A standard of attenuation for microwave measurements: ER -