DIGITAL CLOCK

Chicago citation style
National Aeronautics and Space Administration. John H. Glenn Research Center at Lewis Field. 3/1/1999. DIGITAL CLOCK. Retrieved from the Digital Public Library of America, http://catalog.archives.gov/id/17421095. (Accessed August 21, 2018.)
APA citation style
National Aeronautics and Space Administration. John H. Glenn Research Center at Lewis Field. 3/1/1999, DIGITAL CLOCK. Retrieved from the Digital Public Library of America, http://catalog.archives.gov/id/17421095
MLA citation style
National Aeronautics and Space Administration. John H. Glenn Research Center at Lewis Field. 3/1/1999. Retrieved from the Digital Public Library of America <http://catalog.archives.gov/id/17421095>.
Note: These citations are programmatically generated and may be incomplete.