The standard defines special probability distributions and gives short additional explanations.
DIN 55350-22:1987 history
2009DIN ISO 3534-1:2009 Statistics - Vocabulary and symbols - Part 1: General statistical terms and terms used in probability (ISO 3534-1:2006); Text in German and English
1987DIN 55350-22:1987 Quality assurance and statistical terminology; statistical terminology; special probability distributions