TY  - RPRT
TI  - Analysis, design, fabrication and testing of an optical tip clearance sensor
AU  - Poppel, G. L.
AU  - Marple, D. T. F.
AU  - Kingsley, J. D.
PY  - 1981
UR  - https://ntrs.nasa.gov/citations/19830002857
ID  - 19830002857
ER  -