2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/207474We summarize the experimental and theoretical results presented in the ``Structure Function Working Group - WG1'' at DIS'99.22 pages, 23 figures, Latex, nbp.sty. To be published in the proceedings of DIS'99, Zeuthen, Germany, 19-23 April 1999High Energy Physics - ExperimentHigh Energy Physics - Phenomenologytext