美国国家公园管理局 (Chinese Wikipedia)

Analysis of information sources in references of the Wikipedia article "美国国家公园管理局" in Chinese language version.

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nps.gov

Frequently Asked Questions. nps.gov. National Park Service. [July 19, 2021]. （原始内容存档于2022-04-18）.
Designation of National Park System Units. National Park Service. [2008-04-05]. （原始内容存档于2008-04-06）.
The National Park Service Organic Act. National Park Service. [2008-04-05]. （原始内容存档于2012-01-22）.
America the Beautiful – National Parks and Federal Recreational Lands Pass. [2014-08-10]. （原始内容存档于2013-12-07）.

Directors of the National Park Service. National Park Service. [2008-04-05]. （原始内容存档于2015-04-07）.