TY - GEN AU - Sansalone, Mary AU - Carino, Nicholas J C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 1986-01-01 05:01:00 DO - https://doi.org/10.6028/NBS.IR.86-3452 LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 1986 TI - Impact-echo ::a method for flaw detection in concrete using transient stress waves ER -