胡德山国家森林 (Chinese Wikipedia)

Analysis of information sources in references of the Wikipedia article "胡德山国家森林" in Chinese language version.

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2,773^rd place

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foresthistory.org

The National Forests of the United States (PDF). ForestHistory.org. [2012-07-30]. （原始内容存档 (PDF)于2013-02-12）.

Land Areas of the National Forest System (PDF). U.S. Forest Service. January 2012 [2012-06-30]. （原始内容存档 (PDF)于2013-01-16）.
Revised Visitation Estimates （页面存档备份，存于互联网档案馆） - National Forest Service
About Us. Mt. Hood National Forest. U.S. Forest Service. [2007-09-06]. （原始内容存档于2011-01-26）.
Bolsinger, Charles L.; Waddell, Karen L. Area of old-growth forests in California, Oregon, and Washington (PDF). 美国国家森林局, Pacific Northwest Research Station. 1993 [2018-02-18]. Resource Bulletin PNW-RB-197. （原始内容 (PDF)存档于2020-10-23）.

Revised Visitation Estimates （页面存档备份，存于互联网档案馆） - National Forest Service
About Us. Mt. Hood National Forest. U.S. Forest Service. [2007-09-06]. （原始内容存档于2011-01-26）.
Bolsinger, Charles L.; Waddell, Karen L. Area of old-growth forests in California, Oregon, and Washington (PDF). 美国国家森林局, Pacific Northwest Research Station. 1993 [2018-02-18]. Resource Bulletin PNW-RB-197. （原始内容 (PDF)存档于2020-10-23）.

Land Areas of the National Forest System (PDF). U.S. Forest Service. January 2012 [2012-06-30]. （原始内容存档 (PDF)于2013-01-16）.
The National Forests of the United States (PDF). ForestHistory.org. [2012-07-30]. （原始内容存档 (PDF)于2013-02-12）.