Instance of: http://www.w3.org/2004/02/skos/core#Concept
Subject Field Subject Field/52
Is Reference of Underground quarry-en#Sense
Ondergrondse groeve-nl#Sense
Underjordiskt stenbrott-sv#Sense
Pedreiras subterrâneas-pt#Sense
Pedreira subterrânea-pt#Sense
Unterirdischer Steinbruch-de#Sense
Underjordisk stenbrud-da#Sense
Cava sotterranea-it#Sense
Υπόγειο λατομείο-el#Sense
Maanalainen louhos-fi#Sense
Carrière souterraine-fr#Sense
Cantera subterránea-es#Sense