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age was 84. He was widely known as a conservationist. National Parks Conservation Association （页面存档备份，存于互联网档案馆） The Wilderness Society's official website
State Parks. National Association of State Park Directors. [2011-05-19]. （原始内容存档于2017-02-10）. Parks by the Numbers (PDF). California State Parks Quick
html （页面存档备份，存于互联网档案馆） http://www.wildmadagascar.org/conservation/parks/Kirindy_Mitea.html （页面存档备份，存于互联网档案馆） https://www.yumpu
环境组织名录
Yukon Conservation Initiative） 青年的响声（英语：youthNoise） 非洲美国人环境主义者联合会（英语：African American Environmentalist Association） 非洲保护基金会（英语：African Conservation Foundation）
(1995) Wild Ocean: America's Parks Under the Sea (1999) The Atlas of the Ocean (2001) Ocean: An Illustrated Atlas (National Geographic Atlas) (2008) The