Instance of: http://www.w3.org/2004/02/skos/core#Concept
Subject Field unknown
Is Reference of Holte-nl#Sense
Hålrumsvolym-sv#Sense
Volume des vides-fr#Sense
Volume de vazios-pt#Sense
Tyhjä tila-fi#Sense
Porevolumen-da#Sense
Space-en#Sense
Void-en#Sense
Hohlraumvolumen-de#Sense
Porvolym-sv#Sense
Όγκος κενών-el#Sense