TY  - RPRT
TI  - Strength degradation of brittle surfaces : blunt indenters
AU  - Lawn, B R
AU  - Wiederhorn, S M
AU  - Johnson, H H
PY  - 1975
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS IR 75-664
DO  - 10.6028/NBS.IR.75-664
ER  -