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Ferguson, D.J. and Kiesling. R. 1997. Puna bonnieae (Cactaceae), a new species from Argentina. Cactus and Succulent Journal (US) 69: 287– 293. IUCN. 2002. 2002 IUCN Red List of Threatened Species. www.iucnredlist.org. Downloaded on 8 October 2002. Stuppy, W. 2001. A new combination in Tephrocactus Lem. (Cactaceae). Kew Bulletin 56:1003-1005. |
| Citation: | Stuppy, W. & Kiesling, R. 2002. Tephrocactus bonnieae. In: IUCN 2012. IUCN Red List of Threatened Species. Version 2012.2. <www.iucnredlist.org>. Downloaded on 21 May 2013. |
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