Instance of: http://www.w3.org/2004/02/skos/core#Concept
Subject Field unknown
Is Reference of Carbonification-fr#Sense
Houillification-fr#Sense
Inkolning-sv#Sense
Coalification-en#Sense
Fossilizzazione-it#Sense
Carbonificación-es#Sense
Carbonificação-pt#Sense
Ενανθράκωσις-el#Sense
Inkoling-nl#Sense
Inkohlung-de#Sense
Hiiltyminen-fi#Sense