TY  - RPRT
TI  - Quiet engine program flight engine design study
AU  - Klapproth, J. F.
AU  - Neitzel, R. E.
AU  - Seeley, C. T.
PY  - 1974
UR  - https://ntrs.nasa.gov/citations/19740025113
ID  - 19740025113
ER  -