Long-Term Changes of the North European Land Bird Fauna

The natural regulation of animal numbers

1972 • 3,088 citations

Estimating Relative Densities of Breeding Birds by the Line Transect Method

1975 • 169 citations

Comparison Between Two Methods of SNR Measurement of Image Tubes

1974 • 17 citations

Estimating Relative Densities of Breeding Birds by the Line Transect Method. II. Comparison between Two Methods

1976 • 14 citations

Species diversity of finnish birds part 1 zoo geographical zonation based on land birds

1973 • 13 citations