See also:

• Science: Chemistry: Elements: Transition Metals  (3)

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).