TY - GEN AU - Lawn, B R AU - Wiederhorn, S M AU - Johnson, H H C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 1975-01-01 05:01:00 DO - https://doi.org/10.6028/NBS.IR.75-664 LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 1975 TI - Strength degradation of brittle surfaces ::blunt indenters ER -