Шефер, Джон Адольф (Russian Wikipedia)

Analysis of information sources in references of the Wikipedia article "Шефер, Джон Адольф" in Russian language version.

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worldcat.org

North American trees : being descriptions and illustrations of the trees growing independently of cultivation in North America, north of Mexico and the West Indies; with the assistance of John Adolph Shafer.
A preliminary list of the vascular flora of Allegheny County, Pennsylvania
North American trees: being descriptions and illustrations of the trees growing independently of cultivation in North America, north of Mexico and the West Indies