2015DIN EN 933-4:2015-01 Tests for geometrical properties of aggregates - Part 4: Determination of particle shape - Shape index; German version EN 933-4:2008
2008DIN EN 933-4:2008 Tests for geometrical properties of aggregates - Part 4: Determination of particle shape - Shape index; English version of DIN EN 933-4:2008-06
1999DIN EN 933-4:1999 Tests for geometrical properties of aggregates - Part 4: Determination of particle shape; shape index; German version EN 933-4:1999