Lanthanum
Links
Visual Elements: Lanthanum
http://www.chemsoc.org/viselements/pages/lanthanum.html
Image, appearance, source, uses, and general and physical information.
It's Elemental: Lanthanum
http://education.jlab.org/itselemental/ele057.html
Basic physical and historical information.
ChemicalElements.com: Lanthanum
http://www.chemicalelements.com/elements/la.html
Basic information, atomic structure, and isotopes.
Lanthanum
http://www.scescape.net/~woods/elements/lanthanum.html
Data tables and historic information.
Wikipedia: Lanthanum
http://www.wikipedia.org/wiki/Lanthanum
Properties of the element, including its history, applications, and charateristics.
EnvironmentalChemistry.com: Lanthanum
http://environmentalchemistry.com/yogi/periodic/La.html
Atomic structure, chemical and physical properties, and table of nuclides.
WebElements: Lanthanum
http://www.webelements.com/webelements/elements/text/La/key.html
Extensive information on history, uses, occurrence, compounds, and properties.
Lenntech: Lanthanum
http://www.lenntech.com/Periodic-chart-elements/La-en.htm
Physical data, chemical properties, health and environmental effects.