Woodsia alpina (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Woodsia alpina" in English language version.

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438^th place

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1zipcodezoo.com

9,447^th place

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1books.google.com

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books.google.com

Cobb, Boughton (1975) A handbook of ferns and their related families in the North American continent based on visual identification. HMCO Field Guides. ISBN 0-395-97512-3. p. 148.

caithness.org

"Caithness CWS - Caithness Field Club - Annual Bulletins - 1975 - October - Conservation".

efloras.org

"Flora of North America: Woodsia alpina" efloras.org. Retrieved 14 June 2008.

rbge.org.uk

rbg-web2.rbge.org.uk

"From coast to summit - two Woodsia ferns" RBGE. Retrieved 15 June 2008.

rook.org

"Woodsia alpina" Rook.org. Retrieved 14 June 2008.

usda.gov

plants.usda.gov

"Plants profile: Woodsia alpina (Bolton) Gray" USDA. Retrieved 12 June 2008.

zipcodezoo.com

"Woodsia alpina: (Alpine Cliff Fern, Alpine Woodsia, Northern Woodsia)" ZipcodeZoo.com. Retrieved 14 June 2008.