ChemGlobe: Molybdenum
- Electronic, thermal, and steric data along with an isotope table.
- http://partisans.spurious.biz/~pkremer/projects/chemglobe/ptoe/_/42.html

LANL: Molybdenum
- History, sources, uses, and properties.
- http://periodic.lanl.gov/elements/42.html

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

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

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

Visual Elements: Molybdenum
- Image, general and physical information, source, uses, key isotopes, and ionisation energies.
- http://www.chemsoc.org/viselements/pages/molybdenum.html

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

It's Elemental: Molybdenum
- Basic physical and historical information.
- http://education.jlab.org/itselemental/ele042.html

ChemicalElements.com: Molybdenum
- Basic information, atomic structure, and table of isotopes.
- http://www.chemicalelements.com/elements/mo.html

Radiochemistry of Molybdenum
- Full text of the monograph by E. M. Scadden (U.S. Naval Radiological Defense Laboratory, San Francisco, California). [PDF]
- http://lib-www.lanl.gov/cgi-bin/getfile?rc000069.pdf