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By: Georgieva, Margarita - Georgiev, Georgi - Mirchev, Plamen - Ivanov, Veselin - Hristova, Mihaela - Belilov, Sevdalin - Dodev, Yonko - Madzhov, Svetozar - Georgieva, LyubomiraType: ArticleIn: Silva BalcanicaVolume: 25Series:Issue: 3Date: 2024-12-31Page Range: 99--112Publication Info: Sofia, Bulgaria Forest Research Institute - Bulgarian Academy of Sciences (FRI-BAS) [2001]-Subjects: biotic agents Field-protective forest belts health status northeastern Bulgaria