แม่แบบ:R:hy:Greppin:1985
Greppin, Mary E. H. (1985), chapter The birds of the Hrazdan gorge in Yerevan, in Journal of Armenian Studies, volume II, issue 1, pages 63–69
Greppin, Mary E. H. (1985), chapter The birds of the Hrazdan gorge in Yerevan, in Journal of Armenian Studies, volume II, issue 1, pages 63–69