Indium

ChemGlobe: Indium - Electronic, thermal, and steric data along with an isotope table.
partisans.spurious.biz/~pkremer/projects/chemglobe/ptoe/_/49.html

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

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

It's Elemental: Indium - Basic physical and historical information.
education.jlab.org/itselemental/ele049.html

LANL: Indium - History, sources, properties, and uses.
periodic.lanl.gov/elements/49.html

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

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

Visual Elements: Indium - Image, appearance, uses, physical information, and ionisation energies.
www.chemsoc.org/viselements/pages/indium.html

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

Radiochemistry of Indium - Full text of the monograph by Duane Neuman Sunderman (Battelle Memorial Institute, Columbus, Ohio) and Charles William Townley (Battelle Memorial Institute, Columbus, Ohio). [PDF] <small>(May, 1960)</small>
lib-www.lanl.gov/cgi-bin/getfile=3frc000020.pdf