GEORGIEVA, M. Research and production integration in the agricultural sector of the Bulgarian economy (1970–1990s). Ukrainian Peasant, [S. l.], n. 25, 2021. DOI: 10.31651/2413-8142-2021-25-Georgieva. Disponível em: https://ukr-selianyn-ejournal.cdu.edu.ua/article/view/4295. Acesso em: 3 may. 2024.