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\bibitem{Maron_etal2006} Maron, P. A., Schimann, H., Ranjard, L., Brothier, E., Domenach, A. M., Lensi, R., et al. (2006). Evaluation of quantitative and qualitative recovery of bacterial communities from different soil types by density gradient centrifugation. \textit{Eur. J. Soil Biol.}, \textit{42}(2), 65--73.

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