Entered from booking ledger and New York Times concert listing and review. The listing indicates that the New York premiere of David Saperstein's Sextet was to be part of the program, but apparently the work was not performed, as it is not listed in the program details published with the review, nor is it mentioned by Schonberg. Also, note that the listing and review do not specify performer assignments for instruments with more than one player (violin and viola), so the assignments indicated here are an approximation. Finally, while the review lists the name of a percussionist, Richard Fitz, the scoring of the works performed do not include percussion, so his participation is uncertain. “Jazz/Rock/Folk/Pop: Who Makes Music and Where.” New York Times [New York, N.Y., United States], 8 Apr. 1973, p. 173. AL. Schonberg, Harold C. “Speculum Musicae Offers a Premiere.” New York Times [New York, N.Y., United States], 11 Apr. 1973, p. 38.