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Grasselly György; Agócs Margit; Nagy Katalin: Characterization of insoluble organic substance of sediments by thermal and infrared investigation. In: Acta mineralogica-petrographica, (20) 2. pp. 241-253. (1972)
Grasselly György: Thermal stability and oxidation of Mn3O4. In: Acta mineralogica-petrographica, (20) 2. pp. 227-240. (1972)