TY - GEN AU - J L Eldreth AU - E D Bunten AU - P A Klaus C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 1977-01-01 05:01:00 DO - https://doi.org/10.6028/NBS.SP.480-4 LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 1977 TI - LEAA police equipment survey of 1972, volume IV ::alarms, security equipment, surveillance equipment ER -