Images of 1852 quarter at http://www.his.com/~z/gallery1852.html,
Mark Zimmermann, email@example.com, February 2002. Email message.
Images of state flowers, birds, and trees at http//www.worldbookonline,
Janet Peterson, Peterson@worldbook.com>, December 2001.Email message.
Images of state flags at http://www.grolier.com, Mark Cummings,
Mcummings@grolier.com, November 2001. Email message.
Images of state quarters at http://www.usmint.gov/pressroom/index.cfm?action=photo#50state,
Diane McDevitt, Diane.McDevitt@usmint.treas.gov>, January 2002.