2014DIN EN ISO 3452-1:2014 Non-destructive testing - Penetrant testing - Part 1: General principles (ISO 3452-1:2013, Corrected version 2014-05-01); German version EN ISO 3452-1:2013
2013DIN EN ISO 3452-1:2013 Non-destructive testing - Penetrant testing - Part 1: General principles (ISO 3452-1:2013); German version EN ISO 3452-1:2013
1997DIN EN 571-1:1997 Non-destructive testing — Penetrant testing — Part 1: General principles