00571naa#a2200181#i#450# EN\\bibl\112410 20260118061735.7 2311-1402 20210325b2021####ek#y0engy0150####ca RUS RU Independent training of students for seminars on the discipline “Regional Folk Singing Styles” Journal article Nizhnevartovsk Nizhnevartovsk State University 2021 7 с. Journal article local . 378.1:008:398.8 RUS Solovyova Irina N vestnik.nvsu.ru