Title from title screen (viewed July 15, 2009).; Preserved in the OCLC Digital Archive. Harvested from http://www.orrgroup.org/documents/July2009_Great-Outdoors-America-report.pdf on July 15, 2009.; Research staff: Margaret Walls, Sarah Darley,...
United States. National Park Service.; National parks and reserves--United States.; National parks and reserves--United States--Management.; Nature conservation--Government policy--United States.
Title from title screen (viewed on July 19, 2006).; Harvested from the web on 4/25/07
