Socotra sparrow (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Socotra sparrow" in English language version.

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2,179^th place

1,991^st place

6^th place

archive.org

Sclater, P. L.; Hartlaub, G. (1881). "On the Birds collected in Socotra by Prof. I. B. Balfour". Proceedings of the Scientific Meetings of the Zoological Society of London for the Year 1881. Vol. 1881. pp. 165–175.
Balfour, I. B.; Forbes, Henry O. (1903). "The Birds of Sokotra". In Forbes, Henry O. (ed.). The Natural History of Sokotra and Abd-el-kuri. London: R. H. Porter.
Shelley 1902, pp. 238–239 Shelley, G. E. (1902). The Birds of Africa, Comprising All the Species Which Occur in the Ethiopian Region. Vol. III. London: R. H. Porter.