ChemGlobe: Tungsten
- Electronic, thermal, and steric data along with an isotope table.
- http://partisans.spurious.biz/~pkremer/projects/chemglobe/ptoe/_/74.html

LANL: Tungsten
- Basic information and history.
- http://periodic.lanl.gov/elements/74.html

Wikipedia: Tungsten
- Properties of the element, including its history, applications, and characteristics.
- http://en.wikipedia.org/wiki/Tungsten

Lenntech: Tungsten
- Physical data, chemical properties, health and environmental effects.
- http://www.lenntech.com/Periodic-chart-elements/W-en.htm

ChinaTungsten Online
- Basic properties, compounds, brief history, information about production processes.
- http://chinatungsten.com/chwurl-2-1.htm

EnvironmentalChemistry.com: Tungsten
- Atomic structure, chemical and physical properties, and table of nuclides.
- http://environmentalchemistry.com/yogi/periodic/W.html

Visual Elements: Tungsten
- Image, general and physical information, source, uses, key isotopes, and ionisation energies.
- http://www.chemsoc.org/viselements/pages/tungsten.html

USGS Minerals Information: Tungsten
- Statistics and information on the worldwide supply, demand, and flow of the element (PDF format).
- http://minerals.usgs.gov/minerals/pubs/commodity/tungsten/

ChemicalElements.com: Tungsten
- Basic information, atomic structure, and isotopes.
- http://www.chemicalelements.com/elements/w.html

It's Elemental: Tungsten
- Basic physical and historical information.
- http://education.jlab.org/itselemental/ele074.html

Radiochemistry of Tungsten
- Full text of the monograph by G. W. Leddicotte (Oak Ridge National Laboratory, Oak Ridge, Tennessee). [PDF]
- http://lib-www.lanl.gov/cgi-bin/getfile?rc000011.pdf