П/РА/E20
П/РА/E20
Каталог "CD" | Компактдиск
Ecology 2005
14-th International symposium june, 13-17,Sunny Beach, Bulgaria
(2005)
П/РА/E20
Каталог "CD" | Компактдиск
Ecology 2004
13th International Symposium June, 7-11, Sunny Beach,Bulgaria
(2004)
П/РА/E20
Каталог "CD" | Компактдиск
Ecology
12 th International symposium june, 2-6 Sunny Beach Bulgaria
(2003)
П/РА/Е20
Каталог "CD" | Компактдиск
Ecology 2001
10-th International anniversary sympsium june 7-9 2001 Bourgas
(2001)
Сп Ч E20
Cп J80
Сп J80
Каталог "Периодика" | Периодични издания
Journal of Environmental Protection and Ecology
Т. 11 Solovyov - Truck
П/РА/E20