2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/3950We present the preliminary results of a sub-mm imaging survey of ultracompact HII regions, conducted with the SCUBA bolometer array on JCMT.To appear in Hot Star Workshop III: The Earliest Phases of Massive Star Birth (ed. P.A. Crowther)Astrophysicstext