Instance of: http://www.w3.org/2004/02/skos/core#Concept
Subject Field unknown
Is Reference of Schutzbauwerke-de#Sense
Obras de protección-es#Sense
Beschermend kunstwerk-nl#Sense
Προστατευτικά έργα-el#Sense
Ouvrages de protection-fr#Sense
Estrutura de proteção -pt#Sense
Suojausrakenteet-fi#Sense
Protective structures-en#Sense
Skyddsanordning-sv#Sense