TY - RPRT TI - Measurements of tribological behavior of advanced materials: summary of U. S. results on Vamas round-robin no. 2 AU - Ruff, A W AU - Jahanmir, S PY - 1989 PB - National Institute of Standards and Technology CY - Gaithersburg, MD SN - NIST IR 89-4170 DO - 10.6028/NIST.IR.89-4170 ER -