In addition to the Leonard Bernstein Collection, the Bernstein researcher should be aware of archival material by, about, and related to Bernstein found in other areas of the Music Division's collections. Some music manuscripts and literary materials are individually cataloged, as described on the Music Manuscripts and Literary Materials sections under this topic. The third section, Koussevitzky Commissions, highlights music manuscripts for works commissioned by Koussevitzky as well as the Koussevitzky Music Foundation. Finally, the Related Special Collections section connects researchers with the Music Division's entire listing of special collections and highlights those collections with especially strong ties to Bernstein.