Pinus arizonica (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Pinus arizonica" in English language version.

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7,540^th place

88^th place

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conifers.org

Earle, Christopher J. (29 December 2017). "Pinus arizonica (Arizona pine, pino de Arizona) description – I The Gymnosperm Database". The Gymnosperm Database. Retrieved 9 August 2018.
Earle, Christopher J. (29 December 2017). "Pinus arizonica var. arizonica (Arizona pine, pino de Arizona) description – The Gymnosperm Database". The Gymnosperm Database. Retrieved 10 August 2018.
Earle, Christopher J. (29 December 2017). "Pinus arizonica var. stormiae (pino real) description – The Gymnosperm Database". The Gymnosperm Database. Retrieved 10 August 2018.
Earle, Christopher J. (29 December 2017). "Pinus arizonica var. cooperi (Pino de Cooper) description – The Gymnosperm Database". The Gymnosperm Database. Retrieved 10 August 2018.