Instance of: http://www.w3.org/2004/02/skos/core#Concept
Subject Field unknown
Is Reference of Svingningsperiode-da#Sense
Periodo delle oscillazioni-it#Sense
Período das oscilações-pt#Sense
Period of oscillation-en#Sense
Schwingungsdauer-de#Sense
Période des oscillations-fr#Sense
Oscillation period-en#Sense
Trillingsperiode-nl#Sense
Περίοδος ταλάντωσης-el#Sense
Período de oscilaciones-es#Sense