ChemGlobe: Tellurium: Electronic, thermal, and steric data along with an isotope table.
ChemicalElements.com: Tellurium: Basic information, atomic structure, and table of isotopes.
EnvironmentalChemistry.com: Tellurium: Atomic structure, chemical and physical properties, and table of nuclides.
It's Elemental: Tellurium: Basic physical and historical information.
LANL: Tellurium: Sources, properties, handling, and uses.
Lenntech: Tellurium: Physical data, chemical properties, health and environmental effects.
Radiochemistry of Tellurium: Full text of the monograph by G. W. Leddicotte (Oak Ridge National Laboratory, Oak Ridge, Tennessee). [PDF]
Tellurium: Data tables and historic information.
Visual Elements: Tellurium: General and physical information, source, uses, key isotopes, and ionisation energies.
WebElements: Tellurium: Extensive information on history, uses, occurrence, compounds, and properties.
Wikipedia: Tellurium: Properties of the element, including its history, applications, and characteristics.