Jess, Z. (1808). The American tutor's assistant, or, a compendious system of practical arithmetic ; containing, the several rules of that useful science, concisely defined, methodically arranged, and fully exemplified ; the whole particularly adapted to the easy and regular instruction of youth in our American schools (8th ed.). Philadelphia: Joseph Crukshank.

Jess, Zachariah. The American Tutor's Assistant, Or, a Compendious System of Practical Arithmetic ; Containing, the Several Rules of That Useful Science, Concisely Defined, Methodically Arranged, and Fully Exemplified ; the Whole Particularly Adapted to the Easy and Regular Instruction of Youth in Our American Schools. 8th ed. Philadelphia: Joseph Crukshank, 1808.

Jess, Zachariah. The American Tutor's Assistant, Or, a Compendious System of Practical Arithmetic ; Containing, the Several Rules of That Useful Science, Concisely Defined, Methodically Arranged, and Fully Exemplified ; the Whole Particularly Adapted to the Easy and Regular Instruction of Youth in Our American Schools. 8th ed. Philadelphia: Joseph Crukshank, 1808.