Metallic materials - Leeb hardness test - Part 2: Verification and calibration of the testing devices (ISO 16859-2:2015); German version EN ISO 16859-2:2015— 21 стр.
Uncertainty of measurement -- Part 3: Guide to the expression of uncertainty in measurement (GUM:1995) -- Supplement 2: Extension to any number of output quantities— 84 стр.
Metallic materials - Leeb hardness test - Part 2: Verification and calibration of the testing devices (ISO/DIS 16859-2:2013); German version prEN ISO 16859-2:2013
