1.- A 120 YR RECORD OF WIDESPREAD CONTAMINATION FROM MINING OF THE IBERIAN PYRITE BELT GEOLOGICAL SOCIETY OF AMERICA (GSA); BOULDER, CO; USA; UNITED STATES, 1997 Ver registro 2.- A 120-YEAR OLD RECORD OF WIDESPREAD CONTAMINATION FROM MINING OF THE IBERIAN PYRITE BELT AMERICAN GEOPHYSICAL UNION; WASHINGTON, DC; USA; UNITED STATES, 1996 AGU 1996 FALL MEETING Ver registro 3.- High-resolutiion accumulation rate and authigenic U variations on the Nazca Rise, Peru margin, over the last 25 ka American Geophysical Union; Washington, DC; USA; United States, 2004 AGU 2004 fall meeting Ver registro 4.- Iron isotopes in the Amazon River system; weathering and transport signatures American Geophysical Union; Washington, DC; USA; United States, 2004 AGU 2004 fall meeting Ver registro 5.- Zinc isotope variations in natural and cultured marine phytoplankton American Geophysical Union; Washington, DC; USA; United States, 2004 AGU 2004 fall meeting Ver registro
