- ChemGlobe: Gadolinium - Electronic, thermal, and steric data along with an isotope table.
www.vcs.ethz.ch/chemglobe/ptoe/_/64.html
- ChemicalElements.com: Gadolinium - Basic information, atomic structure, and isotopes.
www.chemicalelements.com/elements/gd.html
- Corrosionsource.com: Gadolinium - History, occurrence, properties, isotopes, and uses.
www.corrosionsource.com/handbook/periodic/64.htm
- Gadolinium - Data tables and historic information.
www.scescape.net/~woods/elements/gadolinium.html
- It's Elemental: Gadolinium - Basic physical and historical information.
education.jlab.org/itselemental/ele064.html
- LANL: Gadolinium - History, sources, properties, and uses.
pearl1.lanl.gov/periodic/elements/64.html
- Resource-World.net: Gadolinium - History, background, properties, uses, and sources.
www.resource-world.net/Gd.htm
- Visual Elements: Gadolinium - Image, source, uses, physical information, and key isotopes.
www.chemsoc.org/viselements/pages/gadolinium.html
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