Additions and clarifications to the avifauna of the Utva-Ilek interfluve

Second edition. First publication: Berezovikov H.H. 2001. Additions and refinements to the avifauna of the Utva-Ilek interfluve // Materials for the distribution of birds in the Urals, in the Urals and in Western Siberia. Yekaterinburg: 17-20.