Sonata Brevis No. 2 by Frederick Werlé / Variations by William Sydeman / Partita by Peter Stearns, 1965 February 20, Box: 13. Frederick Werlé music manuscripts and papers, MP-0019-01. The New School Archives. https://findingaids.archives.newschool.edu/repositories/3/archival_objects/54637 Accessed June 07, 2025.