Ohio Sierra Club: http://www.sierraclub.org/chapters/oh/
Ohio Sierra Club, Stopping Suburban Sprawl: http://www.sierraclub.org/chapters/oh/sprawl/sprawl.htm
Sierra Club’s Mission and Policies: http://www.sierraclub.org/policy/
Sierra Club’s Challenge to Sprawl Campaign:
http://www.sierraclub.org/transportation/Challenge%20to%20Sprawl/Toolcweb.htm
Sierra Club 1998 sprawl report: Dark Side of the American Dream
http://www.sierraclub.org/transportation/sprawl/sprawl_report/introtext.htm
National Home Builders Association, rebuttal:
http://www.nahb.com:80/update/story5.html