Rock wool, manufactured at the Gaither Chemical Company, Nashville, Tennessee.

Chicago citation style
Rock wool, manufactured at the Gaither Chemical Company, Nashville, Tennessee.. 1939 September 2. Retrieved from the Digital Public Library of America, http://cdm15138.contentdm.oclc.org/cdm/ref/collection/p15138coll28/id/6377. (Accessed November 20, 2019.)
APA citation style
(1939 September 2) Rock wool, manufactured at the Gaither Chemical Company, Nashville, Tennessee.. Retrieved from the Digital Public Library of America, http://cdm15138.contentdm.oclc.org/cdm/ref/collection/p15138coll28/id/6377
MLA citation style
Retrieved from the Digital Public Library of America <http://cdm15138.contentdm.oclc.org/cdm/ref/collection/p15138coll28/id/6377>.
Note: These citations are programmatically generated and may be incomplete.