- It's Elemental: Manganese - http://education.jlab.org/itselemental/ele025.html
- Basic physical and historical information.
- ChemicalElements.com: Manganese - http://www.chemicalelements.com/elements/mn.html
- Basic information, atomic structure, and isotopes.
- USGS Minerals Information: Manganese - http://minerals.usgs.gov/minerals/pubs/commodity/manganese/
- Statistics and information on the worldwide supply, demand, and flow of the element (PDF format).
- Visual Elements: Manganese - http://www.chemsoc.org/viselements/pages/manganese.html
- General and physical information, source, uses, biological role, key isotopes, and ionisation energies.
- EnvironmentalChemistry.com: Manganese - http://environmentalchemistry.com/yogi/periodic/mn.html
- Atomic structure, chemical and physical properties, and table of nuclides.
- Lenntech: Manganese - http://www.lenntech.com/periodic-chart-elements/mn-en.htm
- Physical data, chemical properties, health and environmental effects.
- Wikipedia: Manganese - http://en.wikipedia.org/wiki/manganese
- Properties of the element, including its history, applications, and characteristics.
- LANL: Manganese - http://periodic.lanl.gov/elements/25.html
- Sources, properties, uses, and handling.
- ChemGlobe: Manganese - http://partisans.spurious.biz/~pkremer/projects/chemglobe/ptoe/_/25.html
- Electronic, thermal, and steric data along with an isotope table.
- Radiochemistry of Manganese - http://library.lanl.gov/cgi-bin/getfile?rc000060.pdf
- Full text of the monograph by R. P. Schuman (Dept. of Chemistry, Robert College, Bebek P.K.8, Istanbul, Turkey).
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