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| de la Rey, PA, van Rensburg, L and Vosloo, A On the use of diatom-based biological monitoring Part 1: A comparison of the response of diversity and aut-ecological diatom indices to water quality variables in the Marico-Molopo River catchment. Water SA, Jan 2008, vol.34, no.1, p.53-60. ISSN 1816-7950
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