[1]
Ryttman, H. 1994. Estimates of survival and population development of the Osprey Pandion haliaetus, Common Buzzard Buteo buteo, and Sparrowhawk Accipiter nisus in Sweden. Ornis Svecica. 4, 4 (Oct. 1994), 159–172. DOI:https://doi.org/10.34080/os.v4.23018.