New system of mercantile arithmetic Adapted to the commerce of the United States, in its domestic and foreign relations : with forms of accounts and other writings usually occurring in trade / by Michael Walsh, 660 - Chandler Collection no. 18, Volume: Chandler Collection no. 18. Clarion University Archives.

New system of mercantile arithmetic Adapted to the commerce of the United States, in its domestic and foreign relations : with forms of accounts and other writings usually occurring in trade / by Michael Walsh, 660 - Chandler Collection no. 18, Volume: Chandler Collection no. 18. Clarion University Archives. http://as-clarion.klnpa.org/repositories/2/resources/999 Accessed December 24, 2025.