BalloonsHelium.com

Aardvark Helium Latex & Mylar Balloons
Distributor of custom printed mylar and latex balloons.
www.aardvark-helium-latex-mylar-balloons.com/

ChemGlobe: Helium
Electronic, thermal, and steric data along with basic information.
partisans.spurious.biz/

LANL: Helium
History, sources, properties, and uses.
periodic.lanl.gov/

Wikipedia: Helium
Properties of the element, including its history, applications, and characteristics.
en.wikipedia.org/

Lenntech: Helium
Physical data, chemical properties, and health effects.
www.lenntech.com/

WebElements: Helium
Extensive information on history, uses, occurrence, and properties of the element.
www.webelements.com/

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

Corrosionsource.com: Helium
History, sources, properties, isotopes, and uses.
www.corrosionsource.com/

Helium
Data tables and historic information.
www.scescape.net/

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