Visual Elements: Magnesium - Image, general and physical information, source, uses, key isotopes, and ionisation energies.
WebElements: Magnesium - Extensive information on history, uses, occurrence, compounds, and properties of the element.
Wikipedia: Magnesium - Properties of the element, including its history, applications, and characteristics.
Radiochemistry of Magnesium - Full text of the monograph by A. W. Fairhall (Dept. of Chemistry, University of Washington, Seattle, Washington). [PDF] (January, 1961)