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R. A. Astini, “The sedimentary units unconformably overlying the red granite at Angosto de La Quesera (Cordillera Oriental, Salta) and their stratigraphical interpretation: a critical revision more than 60 years after the pioneering work by J. Keidel”, RAGA, vol. 60, no. 3, pp. 513-523, Sep. 2005.