Type specimens online: What is available, what is not, and how to proceed; Reflections based on an analysis of the images of type specimens of southern African Polygala ( Polygalaceae ) accessible on the worldwide web

Autor: Smith, Gideon F., Figueiredo, Estrela
Zdroj: Taxon, 2013 Aug 01. 62(4), 801-806.
Databáze: JSTOR Journals
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