Bost, T., Bost, S., & Bowen, R. H. 1. (1981). A frontier family in Minnesota: Letters of Theodore and Sophie Bost, 1851-1920. Minneapolis: University of Minnesota Press.

Bost, Théodore, Sophie Bost, and Ralph H. 1919-2006 Bowen. A Frontier Family in Minnesota: Letters of Theodore and Sophie Bost, 1851-1920. Minneapolis: University of Minnesota Press, 1981.

Bost, Théodore, Sophie Bost, and Ralph H. 1919-2006 Bowen. A Frontier Family in Minnesota: Letters of Theodore and Sophie Bost, 1851-1920. Minneapolis: University of Minnesota Press, 1981.