Determination of a general index of effort in sorting mail by conventional methods /

Chicago citation style
Henig, Seymour. Determination of a general index of effort in sorting mail by conventional methods /. 1960. Retrieved from the Digital Public Library of America, http://catalog.hathitrust.org/Record/011419864. (Accessed December 16, 2018.)
APA citation style
Henig, Seymour, (1960) Determination of a general index of effort in sorting mail by conventional methods /. Retrieved from the Digital Public Library of America, http://catalog.hathitrust.org/Record/011419864
MLA citation style
Henig, Seymour. Retrieved from the Digital Public Library of America <http://catalog.hathitrust.org/Record/011419864>.
Note: These citations are programmatically generated and may be incomplete.