Ulaanbaatar [Ulanbator], 1961 54pp., text in Mongolian in cyrillic script, 22cm., in the series "Corpus Scriptorum Mongolorum Instituti Linguae et Historiae Comiteti Scientiarum et Educationis Altae Reipublicae Populi Mongoli" tomus 15 fasc.1, original softcover, good condition, X91511