Berkelium: Data tables and historic information.
Britannica Nobel Prizes: Berkelium: Overview and basic data.
ChemGlobe: Berkelium: Electronic and thermal data along with an isotope table.
ChemicalElements.com: Berkelium: Basic information, atomic structure, and isotopes.
EnvironmentalChemistry.com: Berkelium: Atomic structure, chemical and physical properties, and table of nuclides.
It's Elemental: Berkelium: Basic physical and historical information.
LANL: Berkelium: Basic information and history.
Lenntech: Berkelium: Physical data, chemical properties, and health effects.
The Columbia Encyclopedia: Berkelium: Overview for the general reader.
Visual Elements: Berkelium: General and physical information, and key isotopes.
WebElements: Berkelium: Extensive information on history, compounds, and properties.