| Citation | Spear, L.B., T.M. Penniman, J.F. Penniman, H.R. Carter and D.G. Ainley 1987 Survivorship and mortality factors in a population of Western Gulls. Seabirds In Hand, J.L., Southern, W.E. and Vermeer, K. (eds.), Ecology and Behaviour of Gulls. Studies in Avian Biology 10:44-56. |
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| Ref. No. | 4519 |
| Language | English |
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