TY  - RPRT
TI  - Wave propagation in ducts using the finite element method
AU  - Majjigi, R. K.
AU  - Sigman, R. K.
AU  - Zinn, B. T.
PY  - 1979
UR  - https://ntrs.nasa.gov/citations/19790042866
ID  - 19790042866
ER  -