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Andrew Colin Joys

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Evaluation of Species Coverage and Precision Using the BBS Indexing Method
An Update on Waterbird Populations on the River Wharfe A Report by the British Trust for Ornithology for Scott Wilson Kirkpatrick & Co Ltd : November 2002
Breeding Periods for Selected Bird Species in England A Report to JNCC
Development of Wild Bird Indicators for Freshwater Wetlands and Waterways Provisional Indicators