| Citation | Bullock, I.D. and C.H. Gomersall, 1981. The breeding populations of terns in Orkney and Shetland in 1980. Bird Study 28:187-200. |
| DOI / ISBN | |
| PDF/Reference URL | |
| Ref. No. | 58616 |
| Language | English |
| Usage | not used yet |
| Comments on the publication | |
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