Instance of: http://www.w3.org/2004/02/skos/core#Concept
Subject Field Subject Field/4026
Is Reference of Travaux effectués par l'entreprise pour elle-même-fr#Sense
Work performed by the undertaking for its own purposes-en#Sense
Świadczenia jednostki na własne potrzeby-pl#Sense
Eigenleistungen-de#Sense