TY  - RPRT
TI  - Concepts for Variable/Multi-Speed Rotorcraft Drive System
AU  - Stevens, Mark A.
AU  - Handschuh, Robert F.
AU  - Lewicki, David G.
PY  - 2008
UR  - https://ntrs.nasa.gov/citations/20080045530
ID  - 20080045530
ER  -