Gallium-Arsenide Manufacturing Technology
The annual International Gallium-Arsenide (GaAs) Manufacturing Technology Conference
http://www.gaasmantech.org/

Discovery of Gallium
Article by P.E. Lecoq de Boisbaudran.
http://dbhs.wvusd.k12.ca.us/webdocs/Chem-History/Disc-of-Gallium.html

LANL: Gallium
Sources, properties, uses, and costs.
http://periodic.lanl.gov/elements/31.html

It's Elemental: Gallium
The Element Gallium - Basic Physical and Historical Information
http://education.jlab.org/itselemental/ele031.html

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

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

ChemGlobe: Gallium
The chemical element [Ga] - Gallium - Datasheet
http://partisans.spurious.biz/~pkremer/projects/chemglobe/ptoe/_/31.html

GALLEX
Gallium radiochemical solar neutrino detector at Gran Sasso.
http://www.mpi-hd.mpg.de/kirsten/gallex.html

Visual Elements: Gallium
General and physical information, key isotopes, and ionisation energies.
http://www.chemsoc.org/viselements/pages/gallium.html

EnvironmentalChemistry.com: Gallium
Comprehensive information for the element Gallium – Ga is provided by this page including scores of properties, element names in many languages, most known nuclides and technical terms are linked to their definitions.
http://environmentalchemistry.com/yogi/periodic/Ga.html