TY  - RPRT
TI  - Variable/Multispeed Rotorcraft Drive System Concepts
AU  - Stevens, Mark A.
AU  - Handschuh, Robert F.
AU  - Lewicki, David G.
PY  - 2009
UR  - https://ntrs.nasa.gov/citations/20090019132
ID  - 20090019132
ER  -