TY - GEN AU - H T Yolken AU - J P Gudas C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 1990-01-01 05:01:00 DO - https://doi.org/10.6028/NIST.IR.4393 LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 1990 TI - Nondestructive evaluation, technical activities 1991: ER -