Elements
- 362
- WebElements: Samarium
- Extensive information on history, uses, occurrence, compounds, and properties.
- 363
- Wikipedia: Samarium
- Properties of the element, including its history, applications, and characteristics.
- 366
- USGS Minerals Information: Scandium
- Statistics and information on the worldwide supply, demand, and flow of the element (PDF format).
- 367
- WebElements: Scandium
- Extensive information on history, uses, occurrence, compounds, and properties of the element.
- 368
- Wikipedia: Scandium
- Properties of the element, including its history, applications, and characteristics.
- 375
- Linking Selenium Sources to Ecosystems: Local and Global Perspectives
- U.S. Geological Survey materials on the environmental sources, biogeochemistry, and toxicology of selenium.
- 376
- USGS Minerals Information: Selenium
- Statistics and information on the worldwide supply, demand, and flow of the element (PDF format).
- 377
- WebElements: Selenium
- Extensive information on history, uses, occurrence, compounds, and properties of the element.