2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/117271We report results from a Spitzer GO-1 program of IRS spectroscopy of a large sample of Luminous Infrared Galaxies and quasars selected from the European Large Area ISO Survey (ELAIS) which have a wide multiwavelength coverage, including ISOCAM, ISOPHOT, IRAC and MIPS (from SWIRE), and optical photometry. We present the sample selection and results from the IRS spectroscopy.4 pages, 3 figures, to appear in proceedings of 'Spitzer IR Diagnostics Conference, Nov 14-16, 2005'Astrophysicstext