See also:

• Science: Chemistry: Elements: Noble Gases  (2)

ChemGlobe: Helium - Electronic, thermal, and steric data along with basic information..

ChemicalElements.com: Helium - Basic information, atomic structure, and table of isotopes..

Corrosionsource.com: Helium - History, sources, properties, isotopes, and uses..

EnvironmentalChemistry.com: Helium - Atomic structure, chemical and physical properties, and table of nuclides..

Especiál Gas Inc.: Helium - Numeric data, uses, and general information..

It's Elemental: Helium - Basic physical and historical information..

LANL: Helium - History, sources, properties, and uses..

Lenntech: Helium - Physical data, chemical properties, and health effects..

USGS Minerals Information: Helium - Statistics and information on the worldwide supply, demand, and flow of the element (PDF format)..

Visual Elements: Helium - Image, animation, discovery, uses, physical information, and key isotopes..

WebElements: Helium - Extensive information on history, uses, occurrence, and properties of the element..

Wikipedia: Helium - Properties of the element, including its history, applications, and characteristics..