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Malla, P.B., Douglas, L.A. Problems in Identification of Montmorillonite and Beidellite. Clays Clay Miner. 35, 232–236 (1987). https://doi.org/10.1346/CCMN.1987.0350310
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DOI: https://doi.org/10.1346/CCMN.1987.0350310