Instance of: http://www.w3.org/2004/02/skos/core#Concept
Subject Field unknown
Is Reference of Grad-Tage-de#Sense
Graddage-da#Sense
Giorni-gradi-it#Sense
Días-grados-es#Sense
Graad-dagen-nl#Sense
Degrees days-en#Sense
Ημέριος βαθμός-el#Sense
Degré-jours-fr#Sense