| Citation | Sanchez, J.M., A. Munoz del Viejo, C. Corbacho, E. Costillo and C. Fuentes 2004 Status and trends of Gull-billed Tern Gelochelidon nilotica in Europe and Africa. Seabirds Bird Conservation International 14:335-351. |
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| Ref. No. | 7242 |
| Language | English |
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