Aeronautics Equipment at Langley, variable pass band filter

Chicago citation style
Aeronautics Equipment at Langley, variable pass band filter. 1949-1949. Retrieved from the Digital Public Library of America, http://search.lib.virginia.edu/catalog/uva-lib:2160394. (Accessed October 16, 2018.)
APA citation style
(1949-1949) Aeronautics Equipment at Langley, variable pass band filter. Retrieved from the Digital Public Library of America, http://search.lib.virginia.edu/catalog/uva-lib:2160394
MLA citation style
Retrieved from the Digital Public Library of America <http://search.lib.virginia.edu/catalog/uva-lib:2160394>.
Note: These citations are programmatically generated and may be incomplete.