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Duke Erik Birgersson (c. 1250 – 17 December 1275) was a Swedish duke of the House of Bjälbo (Folkungaätten).[1][2]
- ^ J. Rosén. "Erik Birgersson". Svenskt biografiskt lexikon. Retrieved January 1, 2019.
- ^ "Folkungaätten". Svenskt biografiskt lexikon. Retrieved August 1, 2020.