@BOOK{NAP19791, title = "NASA's Aeronautics Program: Systems Technology and Experimental Programs", doi = "10.17226/19791", url = "https://nap.nationalacademies.org/catalog/19791/nasas-aeronautics-program-systems-technology-and-experimental-programs", year = 1980, publisher = "The National Academies Press", address = "Washington, DC" }