TY  - RPRT
TI  - Future long-range transports: Prospects for improved fuel efficiency
AU  - Nagel, A. L.
AU  - Alford, W. J., Jr.
AU  - Dugan, J. F., Jr.
PY  - 1975
UR  - https://ntrs.nasa.gov/citations/19750009267
ID  - 19750009267
ER  -