Chemical protective headgear

Chicago citation style
Chemical protective headgear. 1980. Retrieved from the Digital Public Library of America, http://ark.digitalcommonwealth.org/ark:/50959/zk51xk947. (Accessed June 18, 2018.)
APA citation style
(1980) Chemical protective headgear. Retrieved from the Digital Public Library of America, http://ark.digitalcommonwealth.org/ark:/50959/zk51xk947
MLA citation style
Retrieved from the Digital Public Library of America <http://ark.digitalcommonwealth.org/ark:/50959/zk51xk947>.
Note: These citations are programmatically generated and may be incomplete.