DIN EN ISO 19071:2016 Leather - Chemical tests - Determination of chromium(VI) and the reductive potential for chromium tanning agents (ISO 19071:2016)
2016DIN EN ISO 19071:2016-07 Leather - Chemical tests - Determination of chromium(VI) and the reductive potential for chromium tanning agents (ISO 19071:2016); German version EN ISO 19071:2016
2016DIN EN ISO 19071:2016 Leather - Chemical tests - Determination of chromium(VI) and the reductive potential for chromium tanning agents (ISO 19071:2016)