Attribution information for libraries used in applets

Lessons 1 and 2

• JFreeChart version 1.0.1, obtained from this link
• JCommon version 1.0.0, obtained from this link

Attribution information for pictures used in applets

Lesson 2

• Residenceburg picture: Copyright Chris Patriarca, obtained from this link.
• Industryville picture: Copyright Issey Niwa, obtained from this link.
• Commerceton picture: Copyright Ashish Takyar, obtained from this link.
• Substation picture: Copyright Orange County Emergency Management Services, obtained from this link.