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APA Citation
Polo Aparisi, M., Schöll, E. M., & Hille, S. M. (2018). alpine Marsh Tits Poecile palustris palustris exhibit no clear sexual dimorphism other than in wing length. Ringing & migration, 33(1), 36–40. http://access.bl.uk/ark:/81055/vdc_100074896334.0x000049