2018DIN EN 12131:2018-10 Feather and down - Test methods - Determination of the quantitative composition of feather and down (manual method); German version EN 12131:2018
2018DIN EN 12131:2018 Feather and down - Test methods - Determination of the quantitative composition of feather and down (manual method)
1998DIN EN 12131:1998 Feather and down - Test methods - Determination of the quantitative composition of feather and down (manual method); German version EN 12131:1998