TY - GEN AU - Schramm, Raymond E AU - Clark, Alfred V AU - Mitrakovic, Dragan V AU - Cohen, Yossef AU - Schull, Peter J AU - Schaps, Stephen R C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 1991-01-01 05:01:00 DO - https://doi.org/10.6028/NIST.IR.3967 LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 1991 TI - Report no. 22- thread crack detection on railroad wheels ::an ultrasonic system using EMATS ER -