The First Atlas of Breeding Birds in Britain and Ireland: 1968-1972.
Full details of the methods used in the field, how fieldwork was organised and the interpretation of the maps is provided in the published atlas Sharrock, J.T.R. (ed.) (1976) The Atlas of Breeding Birds in Britain and Ireland. T. & A.D. Poyser, Calton or from the British Trust for Ornithology website at www.bto.org/birdatlas/previous/old_methods.htm. Specific queries as they relate to the Republic of Ireland should be made to BirdWatch Ireland www.birdwatchireland.ie
Date range: Jan 1, 1968 - Jan 1, 1972
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