https://www.flightaware.com/photos/view/368798-973825c225a23a50f26e7603055db364e985ff53/airport/KSPZ/sort/votes/page/1/size/vga
Photo of NAVAL AIRCRAFT FACTORY (N4009A) - FlightAware
FlightAware Aviation Photos: NAVAL AIRCRAFT FACTORY(N4009A), Last seen in northern Nevada about three weeks ago at Reno Stead Airport during the 2012 Reno Air...
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https://theses-dissertations.princeton.edu/items/6841320b-7743-43e8-9bac-ee7b80b214b2
The Philadelphia Naval Aircraft Factory and the Emerging American Aircraft Industry 1917-1927: A...
naval aircraft factorythe philadelphiaemergingamericanindustry