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Sort by: Results and Evaluation of the Monthly Waterbird Monitoring 1996-2002 T Michev, L Profirov and M Dimitrov Pensoft Publishers SG Vanev, EF Sameva and GG Bakalova Bulgarian Academy of Sciences Publishing House Results from 25 Years of Mid-Winter Counts carried out at the most important Bulgarian Wetlands Tanyo Michev and Lyubomir Profirov Pensoft Publishers Zoocartographia Balcanica No 1 S Abadjiev Pensoft Publishers Sort by: |