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The hen harrier (historical and ecological survey of this bird of prey in Europe and N. America) : D. Watson. T. and A.D. Poyser,Berkhamsted, 1977, 307 pp., 4 colour plates, 15 text figures, 30 tables, £ 6.80, ISBN 85661-015-1-111 |
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| Authors: | CJ Savory |
| Institution: | Edinburgh, Great Britain |
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