ChemGlobe: Lawrencium
   Electronic and thermal data along with an isotope table.
   http://partisans.spurious.biz/~pkremer/projects/chemglobe/ptoe/_/103.html

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

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

It's Elemental: Lawrencium
   Basic physical and historical information.
   http://education.jlab.org/itselemental/ele103.html

LANL: Lawrencium
   Basic information, history, and properties.
   http://periodic.lanl.gov/elements/103.html

Lenntech: Lawrencium
   Physical data and chemical properties.
   http://www.lenntech.com/Periodic-chart-elements/Lr-en.htm

Visual Elements: Lawrencium
   General and physical information, and key isotopes.
   http://www.chemsoc.org/viselements/pages/lawrencium.html

Wikipedia: Lawrencium
   Characteristics and history of the element.
   http://en.wikipedia.org/wiki/Lawrencium