Changes in land bird populations on the Krunnit Islands in the Bothnian Bay, 1939–77
Viittaaminen
Helle, E., & Helle, P. (1979). Changes in land bird populations on the Krunnit Islands in the Bothnian Bay, 1939–77. Ornis Fennica, 56(4), 137–147. Noudettu osoitteesta https://ornisfennica.journal.fi/article/view/133016