1.- ALUNITA EN ROCAS SEDIMENTARIAS POSTPALEOZOICAS DE LA PROVINCIA DE SALAMANCA; 1981 Ver registro 2.- ANALISIS DE LA FORMA DE LAS PARTICULAS DE SIO::(2) POR ESPECTROSCOPIA IR 1986 Ver registro 3.- Blue "opal" (or cristobalite?) from Rio Grande do Sul, Brazil Gemological Institute of America; Santa Monica, CA; USA; United States, 2011 Proceedings of the Fifth international gemological symposium Ver registro 4.- CAMBIOS MINERALOGICOS Y MICROESTRUCTURALES PRODUCIDOS EN UNA PIROFILITA MEDIANTE TRATAMIENTOS TERMICOS 1989 Ver registro 5.- CARACTERIZACION Y PROPIEDADES DE LAS BENTONITAS DE AMOTAPE (REGION GRAU-PERU) 1993 Ver registro 6.- Characterization and genesis of horizontal banding in Brazilian agate; an X-ray diffraction, thermogravimetric and electron microprobe study Mineralogical Society; London; GBR; United Kingdom, 2013 Ver registro 7.- CHARACTERIZATION OF RESPIRABLE VOLCANIC ASH FROM THE SOUFRIERE HILLS VOLCANO, MONTSERRAT, WITH IMPLICATIONS FOR HUMAN HEALTH HAZARDS SPRINGER INTERNATIONAL [FOR THE] INTERNATIONAL ASSOCIATION OF VOLCANOLOGY AND CHEMISTRY OF THE EARTH, 2003 Ver registro 8.- Clay and zeolite diagenesis of two Miocene felsic tuffs from the Santa Rosalia Basin, Baja California Sur, Mexico American Geophysical Union; Washington, DC; USA; United States, 2009 2009 joint assembly; the meeting of the Americas Ver registro 9.- CONTRIBUCION AL CONOCIMIENTO MINERALOGICO DEL BORDE SW DE LA CUENCA DEL TAJO (TOLEDO-SAN MARTIN DE PUSA) 1977 Ver registro 10.- Cristobalite in a rhyolitic lava dome; evolution of ash hazard Springer International [for the] International Association of Volcanology and Chemistry of the Earth, 2010 Ver registro