Koskimies, P. 1989: Birds as a tool in environmental monitoring. Annales Zoologici Fennici 26: 153166.
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Väisänen, R. A. 1989: Renewal of methodology in the second bird atlas of Finland, 198689. Annales Zoologici Fennici 26: 167172.
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Haila, Y., Hanski, I. K. & Raivio, S. 1989: Methodology for studying the minimum habitat requirements of forest birds. Annales Zoologici Fennici 26: 173180.
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Peterhofs, E. & Priednieks, J. 1989: Problems of applying the line-transect method without repeated counts when the breeding season is long. Annales Zoologici Fennici 26: 181184.
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Hildén, O. & Järvinen, A. 1989: Efficiency of the line-transect method in mountsin birch forest. Annales Zoologici Fennici 26: 185190.
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Verner, J. & Milne, K. A. 1989: Coping with sources of variability when monitoring population trends. Annales Zoologici Fennici 26: 191199.
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Koskimies, P. & Pöysä, H. 1989: Waterfowl censusing in environmental monitoring: a comparison between point and round counts. Annales Zoologici Fennici 26: 201206.
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Massa, R. & Fedrigo, A. 1989: A new approach for compiling a winter bird atlas by means of point-counts. Annales Zoologici Fennici 26: 207212.
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Hanski, I. & Tiainen, J. 1989: Bird ecology and Taylors variance-mean regression. Annales Zoologici Fennici 26: 213217.
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Lack, P. C. 1989: Overall and regional trends in warbler populations of British farmland over 25 years. Annales Zoologici Fennici 26: 219225.
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Petty, S. J. 1989: Productivity and density of tawny owls Strix aluco in relation to the structure of a spruce forest in Britain. Annales Zoologici Fennici 26: 227233.
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Tomialojc, L. & Lontkowski, J. 1989: A technique for censusing territorial song thrushes Turdus philomelos. Annales Zoologici Fennici 26: 235244.
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Orell, M. 1989: Reliability of local breeding records in estimating regional population fluctuations of Parus species. Annales Zoologici Fennici 26: 245254.
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Flousek, J. 1989: Impact of industrial emissions on bird populations breeding in mountain spruce forests in Central Europe. Annales Zoologici Fennici 26: 255263.
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Fuller, R. J., Stuttard, P. & Ray, C. M. 1989: The distribution of breeding songbirds within mixed coppiced woodland in Kent, England, in relation to vegetation age and structure. Annales Zoologici Fennici 26: 265275.
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Virkkala, R. 1989: Short-term fluctuations of bird communities and populations in virgin and managed forests in Northern Finland. Annales Zoologici Fennici 26: 277285.
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Pina, J. P. 1989: Breeding bird assemblages in eucalyptus plantations in Portugal. Annales Zoologici Fennici 26: 287290.
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Fedrigo, A., Fornasari, L., Bonaventura, O., Vigorita, V. & Massa, R. 1989: The winter bird species and their abundance in Lombardy, Northern Italy. Annales Zoologici Fennici 26: 291295.
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Robbins, C. S., Droege, S. & Sauer, J. R. 1989: Monitoring bird populations with Breeding Bird Survey and atlas data. Annales Zoologici Fennici 26: 297304.
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Welsh, D. A. 1989: A report on breeding bird atlases in Canada. Annales Zoologici Fennici 26: 305308.
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Pomeroy, D. E. 1989: Using East African bird atlas data for ecological studies. Annales Zoologici Fennici 26: 309314.
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Raivio, S. 1989: R-mode analysis of taiga bird distributions: comparison between qualitative and quantitative data. Annales Zoologici Fennici 26: 315322.
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Mönkkönen, M. & Helle, P. 1989: Migratory habits of birds breeding in different stages of forest succession: a comparison between the Palaearctic and the Nearctic. Annales Zoologici Fennici 26: 323330.
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