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Bletz, H., Weindler, P., Wiltschko, R. et al. The magnetic field as reference for the innate migratory direction in blackcaps,Sylvia atricapilla . Naturwissenschaften 83, 430–432 (1996). https://doi.org/10.1007/BF01142071
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DOI: https://doi.org/10.1007/BF01142071