2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/4213We discuss velocity variations in different layers of an AGB star's atmosphere. Periodic and nonperiodic changes are observed. From a large sample of data we derive mean velocity curves for miras and semiregular variables.4 pages, 3 figures. To be published in ASP Conf. Ser. Vol. 259 (2002) "Radial and Nonradial Pulsations as Probes of Stellar Physics"Astrophysicstext