TY  - RPRT
TI  - Coupled rotor/airframe vibration analysis program manual manual. Volume 1: User's and programmer's instructions
AU  - Cassarino, S.
AU  - Sopher, R.
PY  - 1982
UR  - https://ntrs.nasa.gov/citations/19820024089
ID  - 19820024089
ER  -