| Cesium: Data tables and historic information. |
| ChemGlobe: Caesium: Electronic, thermal, and steric data along with an isotope table. |
| ChemicalElements.com: Cesium: Basic information, atomic structure, and isotopes table. |
| EnvironmentalChemistry.com: Cesium: Atomic structure, chemical and physical properties, and table of nuclides. |
| It's Elemental: Cesium: Basic physical and historical information. |
| LANL: Cesium: History, sources, properties, and costs. |
| Lenntech: Cesium: Physical data, chemical properties, health and environmental effects. |
| Radiochemistry of Cesium: Full text of the monograph by M. T. Kinsley (Brookhaven National Laboratory, Upton, New York). [PDF] |
| USGS Minerals Information: Cesium: Statistics and information on the worldwide supply, demand, and flow of the element (PDF format). |
| Visual Elements: Caesium: Image, general and physical information, and key isotopes. |
| WebElements: Caesium: Extensive information on history, uses, occurrence, compounds, and properties. |
| Wikipedia: Caesium: Properties of the element, including its history, applications, and characteristics. |
Classical
