Olsson, Christer, Jan Pettersson, and Frank Johansson. 2021. “Breeding Biology of the Red-Throated Loon Gavia Stellata on the Holmöarna Archipelago, Northern Sweden”. Ornis Svecica 31 (January). Lund, Sweden:1–18. https://doi.org/10.34080/os.v31.22276.