Chromium

ChemGlobe: Chromium - Electronic, thermal, and steric data along with an isotopes table.
partisans.spurious.biz/~pkremer/projects/chemglobe/ptoe/_/24.html

ChemicalElements.com: Chromium - Basic information, atomic structure, and isotopes.
www.chemicalelements.com/elements/cr.html

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

It's Elemental: Chromium - Basic physical and historical information.
education.jlab.org/itselemental/ele024.html

LANL: Chromium - History, sources, uses, and compounds.
periodic.lanl.gov/elements/24.html

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

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

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

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

Radiochemistry of Chromium - Full text of the monograph by J. Pijck (Laboratory for Analytical Chemistry, University of Ghent, Ghent, Belgium). <small>(December, 1964)</small>
lib-www.lanl.gov/cgi-bin/getfile=3frc000002.pdf