Helmet

Chicago citation style
Helmet. 1961-07-21. Retrieved from the Digital Public Library of America, http://cdm16066.contentdm.oclc.org/cdm/ref/collection/p181901coll35/id/366. (Accessed July 16, 2018.)
APA citation style
(1961-07-21) Helmet. Retrieved from the Digital Public Library of America, http://cdm16066.contentdm.oclc.org/cdm/ref/collection/p181901coll35/id/366
MLA citation style
Retrieved from the Digital Public Library of America <http://cdm16066.contentdm.oclc.org/cdm/ref/collection/p181901coll35/id/366>.
Note: These citations are programmatically generated and may be incomplete.