 Other works to include Salzedo's techniques are "Variations for Orchestra" by Elliott Carter and Concerto for Harp by Alberto Ginastera.Prokofiev, Milhaud, Anton Webern, Hindemith, and Ernst Krenek all wrote for the harp in ways that used Salzedo's techniques.Most composers explained the techniques in the music rather than using Salzedo's notation, because no single source compiled the effects and their notations.