UNE-EN 12131:2018 Feather and down - Test methods - Determination of the quantitative composition of feather and down (manual method) (Endorsed by Asociación Española de Normalización in October of 2018.)
2018UNE-EN 12131:2018 Feather and down - Test methods - Determination of the quantitative composition of feather and down (manual method) (Endorsed by Asociación Española de Normalización in October of 2018.)
1999UNE-EN 12131:1999 FEATHER AND DOWN - TEST METHODS - DETERMINATION OF THE QUANTITATIVE COMPOSITION OF FEATHER AND DOWN (MANUAL METHOD)