| Reference: Articles, papers etc. | |
State of the UK's birds 2001By R. D. Gregory et. al.
Annual Publication from the RSPB, BTO, WWT and JNCC. This summarises the 2001 results of various on-going long term population monitoring programs in relation to the long and short term population trends.
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Gregory, R. D., Noble, D. G., Robinson, J. A., Stroud, D. A., Campbell, L. H., Rehfisch, M. M., Cranswick, P. A., Wilkinson, N. I., Crick, H. Q. P. and Green, R. E. 2002. The State of the UK's birds 2001. The RSPB, BTO, WWT and JNCC, Sandy.
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