Cobalt

See also:

ChemGlobe: Cobalt - Electronic, thermal, and steric data, along with isotopes table.
ChemicalElements.com: Cobalt - Basic information, atomic structure, and isotopes.
EnvironmentalChemistry.com: Cobalt - Atomic structure, chemical and physical properties, and table of nuclides.
It's Elemental: Cobalt - Basic physical and historical information.
LANL: Cobalt - History, sources, properties, and uses.
Lenntech: Cobalt - Physical data, chemical properties, health and environmental effects.
USGS Minerals Information: Cobalt - Statistics and information on the worldwide supply, demand, and flow of the element (PDF format).
Visual Elements: Cobalt - Image, general and physical information, source, uses, biological role, key isotopes, and ionisation energies.
WebElements: Cobalt - Extensive information on history, uses, occurrence, compounds, and properties of the element.
Wikipedia: Cobalt - Properties of the element, including its history, applications, and characteristics.
Radiochemistry of Cobalt - Full text of the monograph by L.C. Bate (Oak Ridge National Laboratory, Oak Ridge, Tennessee). [PDF] (September, 1961)