北美白樺 (Chinese Wikipedia)

Analysis of information sources in references of the Wikipedia article "北美白樺" in Chinese language version.

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bouldercolorado.gov

Cooper, David J. Ecological Survey of the City of Boulder, Colorado Mountain Parks (PDF). City of Boulder Parks and Recreation Department: 16. Spring 1984 [2011-09-16]. （原始内容 (PDF)存档于2011-09-05）.

The Plant List. The Plant List. [2012-10-10]. （原始内容存档于2019-01-25）.
Betula papyrifera. Flora of North America. [2018-04-05]. （原始内容存档于2018-05-24）.
Cooper, David J. Ecological Survey of the City of Boulder, Colorado Mountain Parks (PDF). City of Boulder Parks and Recreation Department: 16. Spring 1984 [2011-09-16]. （原始内容 (PDF)存档于2011-09-05）.