DIN EN 16109:2012-01 Fertilizers - Determination of complexed micro-nutrient ions in fertilizers - Identification of lignosulfonates; German version EN 16109:2011
2012DIN EN 16109:2012-01 Fertilizers - Determination of complexed micro-nutrient ions in fertilizers - Identification of lignosulfonates; German version EN 16109:2011