Normal Instructor and Teachers World, April 1906, MS398_08-10, Box: 8 Oversize, Folder: 10. Joseph L. Rousseau Collection of Mathematical Materials, MS398. Millersville University Special Collections.

Normal Instructor and Teachers World, April 1906, MS398_08-10, Box: 8 Oversize, Folder: 10. Joseph L. Rousseau Collection of Mathematical Materials, MS398. Millersville University Special Collections. https://millersville.as.atlas-sys.com/repositories/2/archival_objects/36866 Accessed June 10, 2024.