TY - GEN AU - Clark, Howard E C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 1981-01-01 05:01:00 DO - https://doi.org/10.6028/NBS.SP.613 LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 1981 TI - Requirements for an effective national nonionizing radiation measurement system: ER -