2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/47039The phenomenology of heavy quarkonia production in fixed target experiments and at the Tevatron and HERA colliders is reviewed. The latest theoretical results are presented and compared with data, with emphasis on the predictions of the factorization approach by Bodwin, Braaten and Lepage.10 pages, LaTeX2e, 7 plots included. To appear, in a slightly shortened form, in the Proceedings of the XXXII Rencontres de MoriondHigh Energy Physics - PhenomenologyPhenomenology of quarkonia production in fixed target experiments and at the Tevatron and HERA colliderstext