Instance of: http://www.w3.org/2004/02/skos/core#Concept
Subject Field unknown
Is Reference of Innéacs idirnáisiúnta gairbhe-ga#Sense
International Roughness Index-en#Sense
Indice de rugosité international-fr#Sense
Índice de Irregularidade Internacional-pt#Sense
IRI-ga#Sense
IRI-fr#Sense
IRI-en#Sense