TY - GEN AU - Gene E Golden AU - Roy B Hunter C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 1939-01-01 05:01:00 DO - https://doi.org/10.6028/NBS.BMS.28 LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 1939 TI - Backflow prevention in over-rim water supplies: ER -