Instance of: http://www.w3.org/2004/02/skos/core#Concept
Subject Field unknown
Is Reference of Rapport de masse-fr#Sense
Massenverhältnis-de#Sense
Razão de massa-pt#Sense
Λόγος μάζας-el#Sense
Relación de masa-es#Sense
Massaverhouding-nl#Sense
Masseforhold-da#Sense
Rapporto di massa-it#Sense
Mass ratio-en#Sense
Massasuhde-fi#Sense
Cóimheas maise-ga#Sense