New normal mental arithmetic : a complete and thorough course by analysis and induction, 660 - Chandler Collection no. 23, Volume: Archives Chandler Collection no. 23. Clarion University Archives.

New normal mental arithmetic : a complete and thorough course by analysis and induction, 660 - Chandler Collection no. 23, Volume: Archives Chandler Collection no. 23. Clarion University Archives. http://as-clarion.klnpa.org/repositories/2/resources/1004 Accessed January 13, 2026.