Rappahannock Concert Association will present Trio con Brio Copenhagen in concert at 7:30.p.m. in the Northumberland High School auditorium. The Trio’s program for the March 11 concert includes two selections written for and dedicated to Trio con Brio Copenhagen–Phantasmagoria by Bent Sorenson and Trio Breve by Per Norgard. Piano Trios by Maurice Ravel and Felix Mendelssohn will complete the program. For more information, call 472-3396 or 580-4541.