Georgieva, M. “ON THE CULTURAL AND HISTORICAL HERITAGE OF SHUMEN FROM THE XIX CENTURY AND ON THE ECONOMIC AND TECHNOLOGICAL INNOVATIONS IN THE CITY: ON THE CULTURAL AND HISTORICAL HERITAGE OF SHUMEN FROM THE XIX CENTURY AND ON THE ECONOMIC AND TECHNOLOGICAL INNOVATIONS IN THE CITY”. JOURNAL SCIENTIFIC AND APPLIED RESEARCH, vol. 25, no. 1, Nov. 2023, pp. 5-14, doi:10.46687/jsar.v25i1.376.