TY  - RPRT
TI  - Optimum design of ninety degree bends
AU  - Modi, Vijay
AU  - Cabuk, Hayri
AU  - Huan, Jian-Chun
AU  - Quadracci, Richard
PY  - 1992
UR  - https://ntrs.nasa.gov/citations/19920023030
ID  - 19920023030
ER  -