Key to the Commercial Arithmetic and to the Treatises on Mensuration and Book-Keeping to which is added a Series of Practical Questions in Mental Arithmetic for Teachers and Private Learners

Key to the Commercial Arithmetic and to the Treatises on Mensuration and Book-Keeping to which is added a Series of Practical Questions in Mental Arithmetic for Teachers and Private Learners, LRC-20A5-29 , Volume: 1. Lasallian Research Collection. https://archivesspace.manhattan.edu/repositories/5/resources/753 Accessed March 20, 2023.