found: Virtuoses Horn. [Phonodisc]
found: His Sonates françaises [SR] p1989, c1988:label (Jaap Schroeder) insert, p. 6 (early-music violinist, conductor & teacher; b. in Amsterdam)
found: Dictionnaire des interprètes et de l'interprétation musicale au XXe siècle, c1995(Schröder, Jaap; b. Dec. 31, 1925, Amsterdam; Dutch violinist)
found: Wikipedia, March 11, 2020(Jaap Schröder; Jaap Schroeder; born December 31, 1925, died January 1, 2020; Dutch violinist, conductor, and pedagogue; member of the Dutch early music group Concerto Amsterdam; he served as the director and concertmaster of the Academy of Ancient Music, and in 1982 he was appointed the visiting music director of the Smithsonian Chamber Players; faculty member at the Schola Cantorum Basiliensis, Yale School of Music, and the Luxembourg Conservatory)