The key to The tutor's guide: or, the arithmetician's repository. Containing the solutions of the questions, &c. in the Tutor's guide. With the references as they stand in the fourth edition. To which is added ... some useful rules, ... Likewise an appendix, ... The third edition, carefully revised and corrected. By Charles Vyse, ...
Vyse, Charles,active 1770-1815.
London : printed for G. Robinson,
1779.
ESTC