2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/171215Each closed oriented 3-manifold $M$ is naturally associated with a set of integers $D(M)$, the degrees of all self-maps on $M$. $D(M)$ is determined for each torus bundle and torus semi-bundle $M$. The structure of torus semi-bundle is studied in detail. The paper is a part of a project to determine $D(M)$ for all 3-manifolds in Thurston's picture.23 pages, 9 figuresGeometric TopologyAlgebraic Topology57M10; 55M25text