1.
Järvinen O, Väisänen RA, Haila Y. Estimating relative densities of breeding birds by the line transect method. III. Temporal constancy of the proportion of main belt observations. Ornis Fenn [Internet]. 1976Jul.1 [cited 2024May9];53(2):40–45. Available from: https://ornisfennica.journal.fi/article/view/132896