Factor Stencils by Derrick N. Lehmer

Chicago citation style
Lehmer, Derrick Norman. Factor Stencils by Derrick N. Lehmer. ca 1929. Retrieved from the Digital Public Library of America, http://collections.si.edu/search/results.htm?q=record_ID%3Anmah_1214102&repo=DPLA. (Accessed November 14, 2018.)
APA citation style
Lehmer, Derrick Norman, (ca 1929) Factor Stencils by Derrick N. Lehmer. Retrieved from the Digital Public Library of America, http://collections.si.edu/search/results.htm?q=record_ID%3Anmah_1214102&repo=DPLA
MLA citation style
Lehmer, Derrick Norman. Retrieved from the Digital Public Library of America <http://collections.si.edu/search/results.htm?q=record_ID%3Anmah_1214102&repo=DPLA>.
Note: These citations are programmatically generated and may be incomplete.