Solfegio. In two parts. Part 1. One voice. Part 2. Two voices. In Russian (ask us if in doubt)/Sol'fedzhio. V dvukh chastyakh. Chast' 1. Odnogolosie. Chast' 2. Dvukhgolosie. Compiled by Boris Vasilyevich Kalmykov and Grigory Abramovich Friedkin. Moscow. Music. 1992. 144 and 112 p. SKUalbdefc4a2e133771ad.