TransliterationRadde G. I. Ornitologicheskaya fauna Kavkaza: (Ornis Caucasica): Sistematicheskoe i biologo-geograficheskoe opisanie kavkazskikh ptits.
In EnglishRaddé G. I. Ornithological fauna of the Caucasus: (Ornis Caucasica): Systematic and biological-geographical description of Caucasian birds. In Russian (ask us if in doubt).
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