It's Elemental: Tungsten - Basic physical and historical information. ChemicalElements.com: Tungsten - Basic information, atomic structure, and isotopes. USGS Minerals Information: Tungsten - Statistics and information on the worldwide supply, demand, and flow of the element (PDF format). EnvironmentalChemistry.com: Tungsten - Atomic structure, chemical and physical properties, and table of nuclides. Wikipedia: Tungsten - Properties of the element, including its history, applications, and characteristics. Radiochemistry of Tungsten - Full text of the monograph by G. W. Leddicotte (Oak Ridge National Laboratory, Oak Ridge, Tennessee). WebElements: Tungsten - Extensive information on history, uses, occurrence, compounds, and properties.