Mengelberg, Rudolf. (1892–1959) [Monteux, Pierre. (1875–1964)] "Missa Pro Pace" - Inscribed to Pierre MonteuxPrinted piano vocal score inscribed on title page to the important French conductor, " mon grand ami Pierre Monteux Amsterdam 18 October 1939 Rudi M." 4to. [PN] U. E. 11. 090. 56 pp. Occasional pencil marks throughout in English in an unknown hand, some separation between wrapper along inside spine, else in fine condition. 9. 25 x 12. 25 inches (23. 5 x 31. 1 cm.). From the collection of Pierre Monteux, an extraordinary association copy linking two of