George Robert Gray: Diferenzas entre revisións
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=== Ligazóns externas ===
*[https://web.archive.org/web/20070506062604/http://miller.emu.id.au/pmiller/books/stick-insects/papers/gray1833/index.html Plates and text from Gray's 1833 Monograph on Phasmidae]
*[http://www.biodiversitylibrary.org/search?searchTerm=George+Robert+Gray#/titles Digitised works by or about George Robert Gray] en Biodiversity Heritage Library.
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