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Supported by the Deutsche Forschungsgemeinschaft SPP „Mechanismen biologischer Uhren“.
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Gwinner, E., Gänshirt, G. Testicular development in european starlings in early spring. Naturwissenschaften 69, 555–557 (1982). https://doi.org/10.1007/BF00463514
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DOI: https://doi.org/10.1007/BF00463514