@misc{1187991, author = {B R Lawn and E R Fuller and S M Wiederhorn}, title = {Strength degradation of brittle surfaces ::sharp indenters}, year = {1975}, month = {1975-01-01 05:01:00}, publisher = {, National Institute of Standards and Technology, Gaithersburg, MD}, doi = {https://doi.org/10.6028/NBS.IR.75-661}, language = {en}, }