TY JOUR TI Oral sources in the study of the subjectivity of Tyumen citizens (1964–1985): methods and techniques of analysis KW oral history KW oral sources KW subjectivity KW narrative method KW citation method KW reconstructive cross-sectional analysis KW targeted depth interview JO Bulletin of Nizhnevartovsk State University AU Fedorova, D.. PY 2025 IS 0 PB Nizhnevartovsk State University