2014DIN EN ISO 13686 Berichtigung 1:2014-05 Natural gas - Quality designation (ISO 13686:2013); German version EN ISO 13686:2013, Corrigendum to DIN EN ISO 13686:2013-12
2014DIN EN ISO 13686 Berichtigung 1:2014 Natural gas - Quality designation (ISO 13686:2013); German version EN ISO 13686:2013, Corrigendum to DIN EN ISO 13686:2013-12
2013DIN EN ISO 13686:2013-12 Natural gas - Quality designation (ISO 13686:2013); German version EN ISO 13686:2013
2013DIN EN ISO 13686:2013 Natural gas - Quality designation (ISO 13686:2013); German version EN ISO 13686:2013
2007DIN EN ISO 13686:2007 Natural gas - Quality designation (ISO 13686:1998); English version of DIN EN ISO 13686:2007-09