2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/49261This talk presents an introduction to the use of dispersion relations to constrain the shapes of hadronic form factors consistent with QCD. The applications described include methods for studying |V_{cb}| and |V_{ub}|, the strange quark mass, and the pion charge radius.8 pages, 3 eps figures, presented at ``Exclusive & Semi-exclusive Processes at High Momentum Transfer,'' Jefferson Lab, Newport News, VA, May 20-22, 1999High Energy Physics - Phenomenologytext