It's Elemental: Beryllium - Basic physical and historical information. Peter Clerkin's - Beryllium - Some information about the element. USGS Minerals Information: Beryllium - Statistics and information on the worldwide supply, demand, and flow of beryllium. ChemicalElements.com: Beryllium - Basic information, atomic structure, and table of isotopes. EnvironmentalChemistry.com: Beryllium - Atomic structure, chemical and physical properties, and table of nuclides. Lenntech: Beryllium - Physical data, chemical properties, health and environmental effects. Wikipedia: Beryllium - Properties of the element, including its history, applications, and characteristics. Radiochemistry of Beryllium - Full text of the monograph by A. W. Fairhall (Dept. of Chemistry, University of Washington, Seattle, Washington). WebElements: Beryllium - Extensive information on history, uses, occurrence, compounds, and properties of the element.