2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/49076The past few years have seen remarkable progress in the theory and phenomenology of QCD, bringing perturbative and nonperturbative methods into closer contact with each other and with experiment.21 pages, 7 eps figures. Plenary talk presented at the meeting of the American Physical Society Division of Particles and Fields (DPF 99), UCLA, Los Angeles, CA, 5-9 Jan 1999High Energy Physics - Phenomenologytext