Instance of: http://www.w3.org/2004/02/skos/core#Concept
Subject Field unknown
Is Reference of IALA-en#Sense
Association internationale de signalisation maritime-fr#Sense
AISM-fr#Sense
Asociación Internacional de Señalización Marítima-es#Sense
AISM-es#Sense
International Association of Lighthouse Authorities-en#Sense