TY  - BOOK
AU  - Ethell, Jeffrey L.
CN  - NAS 1.21:
CN  - TL704.7
CY  - Washington, DC :
DA  - 1983.
ID  - 172175
KW  - Airplanes
PB  - Scientific and Technical Information Branch, National Aeronautics and Space Administration :
PB  - For sale by the Supt. of Docs., U.S. G.P.O.,
PP  - Washington, DC :
PY  - 1983.
T1  - Fuel economy in aviation /
TI  - Fuel economy in aviation /
ER  -