TY  - RPRT
TI  - Strength degradation of brittle surfaces : sharp indenters
AU  - Lawn, B R
AU  - Fuller, E R
AU  - Wiederhorn, S M
PY  - 1975
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS IR 75-661
DO  - 10.6028/NBS.IR.75-661
ER  -