URN:NBN:SI:doc-UTUT9XYU2008Nikolov, Boris P.Nikolov, Ivailo PetrovRagyov, DimitarShurulinkov, PeterStoyanov, Georgedocuments/doc/U/URN_NBN_SI_doc-UTUT9XYU_001.htmdocuments/doc/U/URN_NBN_SI_doc-UTUT9XYU_001.pdfdocuments/doc/U/URN_NBN_SI_doc-UTUT9XYU_001.txt138/13929articlestr. 185-1860351-2851250488320URN:NBN:SI:doc-UTUT9XYUengDruštvo za opazovanje in proučevanje ptic SlovenijeAcrocephalusInCbirdBolgarijaBulgariaornitologijapticesrakoperjiHigh-altitude records of the great grey shrike Lanius excubitor in Bulgaria during migration and winterVišinski podatki o velikem srakoperju Lanius excubitor v Bolgariji v času selitve in prezimovanja