[Program for the first performances of Béla Bartók's Concerto for Orchestra, by the Boston Symphony Orchestra, on 1 and 2 December 1944, conducted by Serge Koussevitzky].

Koussevitzky also conducted the Overture to Mozart's Idomeneo and Franck's Symphony in D Minor.
Collection's copy comprises the program page only, which does not name the orchestra or conductor. Cf. The New Grove online (accessed on 6 November 2003).
Signed by Bartók.