Oklahoma State University
Oklahoma State University: Breeds of Livestock Swine
This site provides a good history of the use of pigs and their origins. It has links to specific examples of pigs and what they are used for.
Alberta Online Encyclopedia
Alberta Online Encyclopedia: Alberta Inventors and Inventions: Jack Stothart and Howard Fredeen
What is the only breed of farm livestock to originate in Canada? Learn about Jack Stothart and Howard Fredeen and their development of the Lacombe swine.
PBS
Pbs Nature: Pigs
This resource offers a clear and concise description of domesticated pigs. Students who need help narrowing their informational search will benefit from this type of condensed resource.