Instance of: http://www.w3.org/2004/02/skos/core#Concept
Subject Field unknown
Is Reference of Indice d'opacité-fr#Sense
Δείκτης θολότητας-el#Sense
Blackness index-en#Sense
Darkness index-en#Sense
Índice de ennegrecimiento-es#Sense
Rookdichtheid-nl#Sense
Opaalisuusindeksi-fi#Sense
Índice de opacidad-es#Sense
Rauchdichte-de#Sense
Indice di opacita-it#Sense
Indice di oscuramento-it#Sense
Rauchdichteindex-de#Sense
Indice de noircissement-fr#Sense
Ondoorzichtigheidsindex-nl#Sense
Röktäthet-sv#Sense
Opacity index-en#Sense
Índice de enegrecimeno-pt#Sense
Δείκτης σκουρήνσεως-el#Sense