Griswold's railroad engineers' pocket companion for the field. Comprising rules for calculating deflexion distances and angles, tangential distances and angles, and all necessary tables for engineers; also, the art of leveling from preliminary survey to the construction of railroads

Chicago citation style
Griswold, W. Griswold's railroad engineers' pocket companion for the field. Comprising rules for calculating deflexion distances and angles, tangential distances and angles, and all necessary tables for engineers; also, the art of leveling from preliminary survey to the construction of railroads. 1855. Retrieved from the Digital Public Library of America, http://catalog.hathitrust.org/Record/011544439. (Accessed December 18, 2018.)
APA citation style
Griswold, W, (1855) Griswold's railroad engineers' pocket companion for the field. Comprising rules for calculating deflexion distances and angles, tangential distances and angles, and all necessary tables for engineers; also, the art of leveling from preliminary survey to the construction of railroads. Retrieved from the Digital Public Library of America, http://catalog.hathitrust.org/Record/011544439
MLA citation style
Griswold, W. Retrieved from the Digital Public Library of America <http://catalog.hathitrust.org/Record/011544439>.
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