TY  - RPRT
TI  - Modal vector estimation for closely-spaced-frequency modes
AU  - Craig, R. R., Jr.
AU  - Chung, Y.-T.
AU  - Blair, M. A.
PY  - 1985
UR  - https://ntrs.nasa.gov/citations/19860062373
ID  - 19860062373
ER  -