Harvard Project Physics Circular Slide Rule

Chicago citation style
Harvard Project Physics Circular Slide Rule. ca 1965. Retrieved from the Digital Public Library of America, http://collections.si.edu/search/results.htm?q=record_ID%3Anmah_1215007&repo=DPLA. (Accessed November 21, 2018.)
APA citation style
(ca 1965) Harvard Project Physics Circular Slide Rule. Retrieved from the Digital Public Library of America, http://collections.si.edu/search/results.htm?q=record_ID%3Anmah_1215007&repo=DPLA
MLA citation style
Retrieved from the Digital Public Library of America <http://collections.si.edu/search/results.htm?q=record_ID%3Anmah_1215007&repo=DPLA>.
Note: These citations are programmatically generated and may be incomplete.