2003DIN EN ISO 2039-1:2003-06 Plastics - Determination of hardness - Part 1: Ball indentation method (ISO 2039-1:2001); German version EN ISO 2039-1:2003
2003DIN EN ISO 2039-1:2003 Plastics - Determination of hardness - Part 1: Ball indentation method (ISO 2039-1:2001); German version EN ISO 2039-1:2003