Bottleneck areas for migratory birds in the Mediterranean region : an assessment of the problems and recommendations for action
1987
Bijlsma, Rob G. |
Bulgaria
The regional expert meeting on cultural landscapes in eastern Europe
2000
Michalowski, Andrzej |
High mountain treeless zone of the Central Balkan National Park : biological diversity and problems of its conservation
2000
Popov, Alexi |
Meshinev, Tenyo |
National action plan for the conservation of the most important wetlands in Bulgaria
1995
Michev, T. |
Ivanov, Bozhidar |
Iankov, Peter |
Matveeva, Elizaveta |
Profirov, Lyubomir |
Iliev, Venelin |
Biodiversity of the Srebarna biosphere reserve : checklist and bibliography
1998
Michev, T. |
Georgiev, B. B. |
Petrova, A. V. |
Stoyneva, M. P. |
Developing local and regional environmental action plans : case studies of Bulgaria, the Czeck Republic, Hungary, Poland and the Slovak Republic
1996
Hak, Tomas |