Ranieri de Calzabigi and Christoph Willibald Gluck, preface to Alceste (1767), in Pestelli, p. 274.
510
Christoph Willibald Gluck, preface to Don Juan (1761), in Reinhard G. Pauly, Music in the Classic Period (Englewood Cliffs, NJ: Prentice-Hall, 1973), p. 161.
