Viola douglasii (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Viola douglasii" in English language version.

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1natureserve.org

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1scholar.google.com

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jstor.org

Clausen, Jens (1964). "Cytotaxonomy and Distributional Ecology of Western North American Violets". Madroño. 17 (6): 173–197. ISSN 0024-9637. JSTOR 41423141.

kew.org

powo.science.kew.org

"Viola douglasii Steud. | Plants of the World Online | Kew Science". Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved 23 December 2024.

natureserve.org

explorer.natureserve.org

NatureServe (6 December 2024). "Viola douglasii | NatureServe Explorer". NatureServe Explorer. Arlington, Virginia. Retrieved 23 December 2024.

scholar.google.com

Hammond, P. C. (1983). "colonization of violets and Speyeria butterflies on the ash-pumice fields deposited by Cascadian volcanoes". Journal of Research on the Lepidoptera. ISSN 0022-4324.

worldcat.org

search.worldcat.org

Hammond, P. C. (1983). "colonization of violets and Speyeria butterflies on the ash-pumice fields deposited by Cascadian volcanoes". Journal of Research on the Lepidoptera. ISSN 0022-4324.
Clausen, Jens (1964). "Cytotaxonomy and Distributional Ecology of Western North American Violets". Madroño. 17 (6): 173–197. ISSN 0024-9637. JSTOR 41423141.