Petar Iankov - Wildlife Ecologist at the BSPB / BirdLIfe Bulgaria Nature Conservation Centre PODA - Bulgarian Society for the Protection of Birds | LinkedIn
PDF) Shifting sands: Taxonomic changes in the world of the field ornithologist
Die 100 Besten Vogelbeobachtungsplätze in Deutschland: Mit GPS Daten [The 100 Best Birdwatching Sites in Germany: With GPS Coordinates] | NHBS Academic & Professional Books
Dutch Birding - International journal on Palearctic birds - Dutch Birding