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| Biko'o, Armand A., du Plessis, Dawid G.C. and Myburgh, Willem J. Population size, structure and habitat features of Haworthia koelmaniorum var. mcmurtryi, an endemic plant from Mpumalanga Province, South Africa. Koedoe, 2011, vol.53, no.1, p.01-08. ISSN 0075-6458
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