Crataegus tanacetifolia (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Crataegus tanacetifolia" in English language version.

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Christensen, Knud Ib (1992). Revision of Crataegus sect. Crataegus and nothosect. Crataeguineae (Rosaceae-Maloideae) in the Old World. Systematic Botany Monographs. Vol. 35. American Society of Plant Taxonomists. ISBN 978-0-912861-35-7.

pfaf.org

Plants for a Future Archived 2009-01-17 at the Wayback Machine.

web.archive.org

Plants for a Future Archived 2009-01-17 at the Wayback Machine.