Instance of: http://www.w3.org/2004/02/skos/core#Concept
Subject Field Subject Field/52
Is Reference of PCN-ro#Sense
PCN-bg#Sense
Полихлорирани нафталини-bg#Sense
Poliklorirani naftaleni-hr#Sense
Polychlorinated naphthalenes-en#Sense
Polychlorierte Naphthalene-de#Sense
Naftaline policlorurate-ro#Sense
PCN-en#Sense
Polichlorintieji naftalenai-lt#Sense