@misc{1126421, author = {A W Ruff}, title = {Metallurgical analysis of wear particles and wearing surfaces:}, year = {1974}, month = {1974-01-01 05:01:00}, publisher = {, National Institute of Standards and Technology, Gaithersburg, MD}, doi = {https://doi.org/10.6028/NBS.IR.74-437}, language = {en}, }