found: Pleyel, I. String quartets, op. 2, nos. 4-6 [SR] p2006:label (Ensō Quartet) insert (Ensō String Quartet: Maureen Nelson, Tereza Stanislav, violins, Robert Brophy, viola, Richard Belcher, cello)
found: Ensō String Quartet WWW site, Aug. 2, 2006(Enso String Quartet [form found in banner logo]; Enso Quartet; formed 1999)
found: Library of Congress Music Division concert, 2006-12-18 [SR] 2006:program notes (Ensō Quartet; Maureen Nelson, John Marcus, violins, Melissa Reardon, viola; Richard Belcher, violoncello)