Voster, E. (1768). Voster elimatus, or the rules of arithmetick digested and explained: In a mercantile course of questions and examples pertinent to each rule, and adapted to the commerce of Ireland. ... The latter part collected chiefly from Walkinghame's Tutor's assistant, in five parts, by the editor. printed by Isaac Jackson; and sold on the editor's account by the booksellers of Dame-street, Castle-street, Caple-street, Skinner-row, and most other booksellers in Dublin: also by H. Ramsey in Waterford, and most other booksellers in Ireland.

Voster, Elias. Voster Elimatus, or the Rules of Arithmetick Digested and Explained: In a Mercantile Course of Questions and Examples Pertinent to Each Rule, and Adapted to the Commerce of Ireland. ... The Latter Part Collected Chiefly from Walkinghame's Tutor's Assistant, in Five Parts, by the Editor. printed by Isaac Jackson; and sold on the editor's account by the booksellers of Dame-street, Castle-street, Caple-street, Skinner-row, and most other booksellers in Dublin: also by H. Ramsey in Waterford, and most other booksellers in Ireland, 1768.