GOŁOŚ, G. Implementation Problems of a New Product — Ornithological Tourism. Regional Barometer. Analyses & Prognoses, [S. l.], v. 14, n. 2, p. 45–52, 2016. DOI: 10.56583/br.604. Disponível em: https://czaz.akademiazamojska.edu.pl/index.php/br/article/view/604. Acesso em: 8 nov. 2024.