TY - GEN AU - Nicholas J Carino C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 1984-01-01 05:01:00 DO - https://doi.org/10.6028/NBS.TN.1199 LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 1984 TI - Pulse-echo method for flaw detection in concrete: ER -