P O http://iconclass.org/46C154%28%2B7349%29

signal system (railway, tramway) (+ track, trail of an animal)

TTL NT
S P O skos:broader
S P O http://iconclass.org/46C154%28%2B734%29
S P O skos:prefLabel
S P O signal system (railway, tramway) (+ track, trail of an animal)