TY - GEN AU - Hockey, B J AU - Wiederhorn, S M AU - Johnson, H C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 1978-01-01 05:01:00 DO - https://doi.org/10.6028/NBS.IR.77-1396 LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 1978 TI - Erosion of brittle materials by solid particle impact: ER -