| Citation | Biber, J.-P. 1993 Status and distribution of the Gull-billed Tern (Sterna nilotica) in the Western Palearctic (Preliminary results of an inquiry). Seabirds In Aguilar, J.S., Monbailliu, X. and Paterson, A.M. (eds.), Status and conservation of seabirds. Ecogeography and Mediterranean Action Plan. Proceedings of the 2nd Mediterranean Seabird Symposium. MEDMARAVIS, GOB and SEO, Madrid, Spain 87-95. |
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| Ref. No. | 6269 |
| Language | English |
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