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1.- A GEOCHRONOLOGICAL (SUPER 40) AR/ (SUPER 39) AR AND (SUPER 87) RB/ (SUPER 87) SR STUDY OF K-MN OXIDES FROM THE WEATHERING SEQUENCE OF AZUL, BRAZIL PERGAMON; OXFORD; III; INTERNATIONAL, 1996 Ver registro
2.- SR ISOTOPIC EVIDENCE FOR IRON-EXCHANGE BUFFERING IN TROPICAL LATERITES FROM THE PARANA, BRAZIL ELSEVIER; AMSTERDAM; NLD; NETHERLANDS, 1997 Ver registro
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