"Lockheed Lodestar - N31G". 1940 Air Terminal Museum. Houston Aeronautical Heritage Society. Archived from the original on 1 February 2017. Retrieved 12 December 2016.
"Lockheed Lodestar - N31G". 1940 Air Terminal Museum. Houston Aeronautical Heritage Society. Archived from the original on 1 February 2017. Retrieved 12 December 2016.