Air Training Department, The Artillery School, U.S. Army, "The New Grasshopper—L-16Archivado el 21 de septiembre de 2018 en Wayback Machine.," (semi-official U.S. Army tutorial written to guide pilots transitioning from the Piper L-4 to the Aeronca L-16) The Field Artillery Journal, Nov-Dec 1947, United States Army,
web.archive.org
Air Training Department, The Artillery School, U.S. Army, "The New Grasshopper—L-16Archivado el 21 de septiembre de 2018 en Wayback Machine.," (semi-official U.S. Army tutorial written to guide pilots transitioning from the Piper L-4 to the Aeronca L-16) The Field Artillery Journal, Nov-Dec 1947, United States Army,