Britannica Nobel Prize: Curium: Overview and basic data.
ChemGlobe: Curium: Electronic, thermal, and steric data along with an isotope table.
ChemicalElements.com: Curium: Basic information, atomic structure, and isotopes.
Curium: History and properties of the element, its isotopes, its spectrum, and its substances.
Curium: Data tables and historic information.
EnvironmentalChemistry.com: Curium: Atomic structure, chemical and physical properties, and table of nuclides.
It's Elemental: Curium: Basic physical and historical information.
LANL: Curium: Basic information and history.
Lenntech: Curium: Physical data, chemical properties, health and environmental effects.
Visual Elements: Curium: General and physical information, source, and key isotopes.
WebElements: Curium: Extensive information on history, compounds, and properties.