Dilian G. Georgiev University of Plovdiv / Plovdiv University of Plovdiv Publishing House Updated Information / Plovdiv University of Plovdiv Publishing House / /
NaturalFeature
Rivers Dams Springs Gastropoda Valvata / Sredna Gora Mountain / Bedechka River / Stara Planina Mt / Sarnena Gora Mt / Sarnena Gora Mountain / Surnena Sredna Gora Mountain / Upper Thracian Lowland / Kazanlashka valley / Sashtinska Sredna Gora Mt / /
Organization
Faculty of Biology / Plovdiv University of Plovdiv Publishing House Updated Information / Plovdiv University / Union of Scientists in Bulgaria / Dilian G. Georgiev University of Plovdiv / Department of Ecology / Plovdiv Publishing House / /