Keuffel & Esser 1740 Thacher Cylindrical Slide Rule

Chicago citation style
Keuffel & Esser Co, Stanley, William Ford. Keuffel & Esser 1740 Thacher Cylindrical Slide Rule. 1882-1887. Retrieved from the Digital Public Library of America, http://collections.si.edu/search/results.htm?q=record_ID%3Anmah_1131303&repo=DPLA. (Accessed November 20, 2018.)
APA citation style
Keuffel & Esser Co, Stanley, William Ford, (1882-1887) Keuffel & Esser 1740 Thacher Cylindrical Slide Rule. Retrieved from the Digital Public Library of America, http://collections.si.edu/search/results.htm?q=record_ID%3Anmah_1131303&repo=DPLA
MLA citation style
Keuffel & Esser Co, Stanley, William Ford. Retrieved from the Digital Public Library of America <http://collections.si.edu/search/results.htm?q=record_ID%3Anmah_1131303&repo=DPLA>.
Note: These citations are programmatically generated and may be incomplete.