Some reactions involved in secondary copper sulphide enrichment

Chicago citation style
Zies, Emanuel George. Some reactions involved in secondary copper sulphide enrichment. 1916]. Retrieved from the Digital Public Library of America, http://catalog.hathitrust.org/Record/102159597. (Accessed December 10, 2018.)
APA citation style
Zies, Emanuel George, (1916]) Some reactions involved in secondary copper sulphide enrichment. Retrieved from the Digital Public Library of America, http://catalog.hathitrust.org/Record/102159597
MLA citation style
Zies, Emanuel George. Retrieved from the Digital Public Library of America <http://catalog.hathitrust.org/Record/102159597>.
Note: These citations are programmatically generated and may be incomplete.