[1]
Strandberg, A. and Asteling, R. 1998. Polygyny, hybridisation, double-brooding, a case of site fidelity and time of laying of the Chiffchaff Phylloscopus collybita in southern Sweden. Ornis Svecica. 8, 3 (Jul. 1998), 125–128. DOI:https://doi.org/10.34080/os.v8.22951.