2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/1243I briefly review the properties of the gas flow in and around the region of the bar in a disc galaxy and discuss the corresponding inflow and the loci of star formation. I then review the flow of gas in barred galaxies which have an additional secondary bar. Finally I discuss the signatures of bars in edge-on galaxies.6 pages, 2 figures, style file incl., to appear in the proceedings of an ESO/CTIO/LCO workshop "Stars, Gas and Dust in Galaxies : Exploring the Links", eds. Alloin, Olsen & Galaz (ASP Conf. Series)Astrophysicstext