ChemGlobe: Rhenium
- Electronic, thermal, and steric data along with an isotope table.
- http://partisans.spurious.biz/~pkremer/projects/chemglobe/ptoe/_/75.html

LANL: Rhenium
- History, sources, properties, and uses.
- http://periodic.lanl.gov/elements/75.html

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

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

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

It's Elemental: Rhenium
- Basic physical and historical information.
- http://education.jlab.org/itselemental/ele075.html

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

USGS Minerals Information: Rhenium
- Statistics and information on the worldwide supply, demand, and flow of the element (PDF format).
- http://minerals.usgs.gov/minerals/pubs/commodity/rhenium/

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

Radiochemistry of Rhenium
- Full text of the monograph by G. W. Leddicotte (Oak Ridge National Laboratory, Oak Ridge, Tennessee). [PDF]
- http://lib-www.lanl.gov/cgi-bin/getfile?rc000051.pdf