Instance of: http://www.w3.org/2004/02/skos/core#Concept
Subject Field unknown
Is Reference of Ypérite au soufre-fr#Sense
Schwefel-Yperit-de#Sense
Diclorodietilsolfuro-it#Sense
Diklorætylsulfid-da#Sense
Yperiet-nl#Sense
Sulphur mustard gas-en#Sense
Θειούχος υπερίτης-el#Sense
Yperit-da#Sense