Instance of: http://www.w3.org/2004/02/skos/core#Concept
Subject Field unknown
Is Reference of Πυκνότητα συχνότητας-el#Sense
Densità di frequenza-it#Sense
Frequency density-en#Sense
Frequentiedichtheid-nl#Sense
Häufigkeitsdichte-de#Sense
Densité de fréquence-fr#Sense
Frekvenstæthed-da#Sense