Helium - Wikipedia
Helium by Mohammad Al-Hassan - Fairwind Sr PS (1159)
Helium Element: (Properties, Uses, and Facts) - Science4Fun
Helium | Definition, Properties, Uses, & Facts | Britannica
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1 Thermodynamic and physical properties of helium | Download Table
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Thermophysical properties of Helium and Air | Download Table
Helium (He) - Physical & Chemical Properties, Uses, Isotopes
Thermophysical properties of helium and air | Download Table
