ChemGlobe: Dysprosium: Electronic, thermal, and steric data along with an isotope table.
ChemicalElements.com: Dysprosium: Basic information, atomic structure, and isotopes table.
Dysprosium: Data tables and history.
EnvironmentalChemistry.com: Dysprosium: Atomic structure, chemical and physical properties, and table of nuclides.
It's Elemental: Dysprosium: Basic physical and historical information.
LANL: Dysprosium: History, properties, uses, and cost.
Lenntech: Dysprosium: Physical data, chemical properties, health and environmental effects.
Visual Elements: Dysprosium: Image, source, uses, physical information, and key isotopes.
WebElements: Dysprosium: Extensive information on history, uses, occurrence, compounds, and properties.
Wikipedia: Dysprosium: Properties of the element, including its history, applications, and characteristics.