ChemGlobe: Vanadium
   Electronic, thermal, and steric data along with an isotope table.
   http://partisans.spurious.biz/~pkremer/projects/chemglobe/ptoe/_/23.html

ChemicalElements.com: Vanadium
   Basic information, atomic structure, and isotopes.
   http://www.chemicalelements.com/elements/v.html

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

It's Elemental: Vanadium
   Basic physical and historical information.
   http://education.jlab.org/itselemental/ele023.html

LANL: Vanadium
   History, sources, uses, and properties.
   http://periodic.lanl.gov/elements/23.html

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

Radiochemistry of Vanadium
   Full text of the monograph by J. L. Brownlee Jr. (Dept. of Chemistry, University of Michigan, Ann Arbor, Michigan). [PDF]
   http://lib-www.lanl.gov/cgi-bin/getfile?rc000005.pdf

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

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

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