TY  - RPRT
TI  - Equilibrium penny-like crack in indentation fracture 
AU  - Lawn, B R
AU  - Fuller, E R
PY  - 1975
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS IR 75-730
DO  - 10.6028/NBS.IR.75-730
ER  -