Ar-39
type: Concept
broader: argon
broader: radioactive isotope
preferred label: آرگون 39 @fa
related: Ar-40/Ar-39

Ar-40/Ar-39
type: Concept
preferred label: نسبت آرگون 40 به آرگون 39 @fa
related: Ar-39

argon
type: Concept
narrower: Ar-39
preferred label: آرگون @fa

radioactive isotope
type: Concept
narrower: Ar-39
preferred label: ایزوتوپ پرتوزا @fa