CPT Robert N. Trapnell, airborne systems engineering action officer, of the Air Weather Service Headquarters explains the operation of a dropsonde. The captain directs the operational test and evaluation of new dropsondes and other airborne weather reconnaissance equipment

Chicago citation style
Department of Defense. American Forces Information Service. Defense Visual Information Center. 1994. CPT Robert N. Trapnell, airborne systems engineering action officer, of the Air Weather Service Headquarters explains the operation of a dropsonde. The captain directs the operational test and evaluation of new dropsondes and other airborne weather reconnaissance equipment. 1980-03-03. Retrieved from the Digital Public Library of America, http://catalog.archives.gov/id/6346484. (Accessed September 19, 2018.)
APA citation style
Department of Defense. American Forces Information Service. Defense Visual Information Center. 1994, (1980-03-03) CPT Robert N. Trapnell, airborne systems engineering action officer, of the Air Weather Service Headquarters explains the operation of a dropsonde. The captain directs the operational test and evaluation of new dropsondes and other airborne weather reconnaissance equipment. Retrieved from the Digital Public Library of America, http://catalog.archives.gov/id/6346484
MLA citation style
Department of Defense. American Forces Information Service. Defense Visual Information Center. 1994. Retrieved from the Digital Public Library of America <http://catalog.archives.gov/id/6346484>.
Note: These citations are programmatically generated and may be incomplete.