Dilworth, T. (1796). The schoolmasters assistant: Being a compendium of arithmetic, both practical and theoretical : in five parts ... to which is prefixed, an essay on the education of youth. Philadelphia: Printed by J. Crukshank.

Dilworth, Thomas. The Schoolmasters Assistant: Being a Compendium of Arithmetic, Both Practical and Theoretical : In Five Parts ... to Which Is Prefixed, an Essay On the Education of Youth. Philadelphia: Printed by J. Crukshank, 1796.

Dilworth, Thomas. The Schoolmasters Assistant: Being a Compendium of Arithmetic, Both Practical and Theoretical : In Five Parts ... to Which Is Prefixed, an Essay On the Education of Youth. Philadelphia: Printed by J. Crukshank, 1796.