ChemGlobe: Rhodium
- Electronic, thermal, and steric data along with an isotope table.
- http://partisans.spurious.biz/~pkremer/projects/chemglobe/ptoe/_/45.html

LANL: Rhodium
- History, sources, properties, and uses.
- http://periodic.lanl.gov/elements/45.html

Wikipedia: Rhodium
- Properties of the element, including its history, applications, and characteristics.
- http://en.wikipedia.org/wiki/Rhodium

Lenntech: Rhodium
- Physical data, chemical properties, health and environmental effects.
- http://www.lenntech.com/Periodic-chart-elements/Rh-en.htm

EnvironmentalChemistry.com: Rhodium
- Atomic structure, chemical and physical properties, and table of nuclides.
- http://environmentalchemistry.com/yogi/periodic/Rh.html

Visual Elements: Rhodium
- General and physical information, source, uses, key isotopes, and ionisation energies.
- http://www.chemsoc.org/viselements/pages/rhodium.html

ChemicalElements.com: Rhodium
- Basic information, atomic structure, and isotopes.
- http://www.chemicalelements.com/elements/rh.html

It's Elemental: Rhodium
- Basic physical and historical information.
- http://education.jlab.org/itselemental/ele045.html

Radiochemistry of Rhodium
- Full text of the monograph by James Armstrong (Florida State University, Tallahassee, Florida). [PDF]
- http://lib-www.lanl.gov/cgi-bin/getfile?rc000063.pdf