DIN 52340-4
DIN 52340-4 Testing of glass; chemical analysis of colourless soda-lime-glass; titrimetric determination of CaO and MgO
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 04/01/1993
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 04/01/1993