Web Elements
Web Elements Periodic Table: Lead
WebElements offers a very nice summary of information on lead. Highly readable (great cartoon) and thorough. Recommended highly.
Houghton Mifflin Harcourt
Harcourt: Biographies: Moses Austin (In Spanish)
Learn about the life and business adventures of the man who dominated the U.S. lead industry in the early 1800s, then made arrangements for American Settlers to move to Spanish Texas. (In Spanish)