Instance of: http://www.w3.org/2004/02/skos/core#Concept
Subject Field unknown
Is Reference of PW-en#Sense
O.w.-nl#Sense
Public works-en#Sense
Travaux publics-fr#Sense
OP-pt#Sense
Openbare werken-nl#Sense
OO.PP.-it#Sense
Opere Pubbliche-it#Sense
TP-fr#Sense
Obras Públicas-pt#Sense
Tiefbau-de#Sense