Arithmetic: Intermediate Course (Third and Fourth Years), LRC-19B2-06, Shelf: LRC 19B2.06. Lasallian Research Collection.
Arithmetic: Intermediate Course (Third and Fourth Years), LRC-19B2-06, Shelf: LRC 19B2.06. Lasallian Research Collection. https://archivesspace.manhattan.edu/repositories/5/resources/3450 Accessed June 02, 2023.
