2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/198540We study how next-to-leading logarithms modify predictions from leading logarithmic soft-gluon resummation in the heavy quark production cross section near threshold. Numerical results are presented for top quark production at the Fermilab Tevatron and bottom quark production at fixed-target energies.35 pages LaTeX, 10 figures, some corrections to the text, discussion of scale and scheme dependence added, tables added, figures updated, accepted for publication in Phys. Rev. DHigh Energy Physics - Phenomenologytext