Author: A. Kukov, D. Daskalova, E. Solenkova, M. Ivanova – Kicheva, I. Nikolov, M. Sabev, Hr. Hristev
Author: Никола Цайкин
1. Morphology and graphic schemes for identification of ticks from family Ixodidae (Acari, Arachnida)
Author: Stancho Petrov, Tatyana Bileva
2. Graphic schemes for identification of harmful rodents
Author: Stancho Petrov
3. Deratization in practice. I. Deratization in a settlement.
Author: Stancho Petrov
4. Deratization in practice. II. Deratization in economic and industrial buildings.
Author: Stancho Petrov
5. Deratization in practice. III. Deratization in agriculture.
Author: Stancho Petrov
6. Deratization in practice. IV. Field deratization.
Author: Stancho Petrov
7. Deratization in practice. V. Control on effectiveness of deratization actions.
Author: Stancho Petrov
8. Adaptive capacity of agriculture: key concepts and attributes
Author: Aleksi Aleksiev
9. Dependency between content of active calcium and a number of basic soil characteristics
Author: Krasimir Trendafilov, Violeta Valcheva