BS EN 843-4:2007 Advanced technical ceramics - Mechanical properties of monolithic ceramics at room temperature - Vickers, Knoop and Rockwell superficial hardness
2007BS EN 843-4:2007 Advanced technical ceramics - Mechanical properties of monolithic ceramics at room temperature - Vickers, Knoop and Rockwell superficial hardness
2007BS EN 843-4:2005 Advanced technical ceramics — Mechanical properties of monolithic ceramics at room temperature — Part 4: Vickers, Knoop and Rockwell superficial hardness