Instance of: http://www.w3.org/2004/02/skos/core#Concept
Subject Field unknown
Is Reference of Passivt solenergisystem-da#Sense
Passive Solaranlage-de#Sense
Système solaire passif-fr#Sense
Passive solar system-en#Sense
Sistema solare passivo-it#Sense
Passief zonnewarmte-systeem-nl#Sense
Παθητικό ηλιακό σύστημα-el#Sense
Sistema de energía solar pasivo-es#Sense