Gummere, J. (1828). A treatise on surveying: Containing the theory and practice: to which is prefixed a perspicuous system of plane trigonometry. The whole clearly demonstrated and illustrated by a large number of appropriate examples, particularly adapted to the use of schools (5th ed., improved.). Philadelphia: Kimber & Sharpless.

Gummere, John. A Treatise On Surveying: Containing the Theory and Practice: To Which Is Prefixed a Perspicuous System of Plane Trigonometry. The Whole Clearly Demonstrated and Illustrated By a Large Number of Appropriate Examples, Particularly Adapted to the Use of Schools. 5th ed., improved. Philadelphia: Kimber & Sharpless, 1828.

Gummere, John. A Treatise On Surveying: Containing the Theory and Practice: To Which Is Prefixed a Perspicuous System of Plane Trigonometry. The Whole Clearly Demonstrated and Illustrated By a Large Number of Appropriate Examples, Particularly Adapted to the Use of Schools. 5th ed., improved. Philadelphia: Kimber & Sharpless, 1828.