NF P18-621-3/A1*NF EN 932-3/A1:2004 Tests for general properties of aggregates - Part 3 : procedure and terminology for simplified petrographic description
2004NF P18-621-3/A1*NF EN 932-3/A1:2004 Tests for general properties of aggregates - Part 3 : procedure and terminology for simplified petrographic description