TY  - RPRT
TI  - Flow structure generated by perpendicular blade-vortex interaction and implications for helicopter noise prediction. Volume 1: Measurements
AU  - Wittmer, Kenneth S.
AU  - Devenport, William J.
PY  - 1996
UR  - https://ntrs.nasa.gov/citations/19960014827
ID  - 19960014827
ER  -