@misc{indiciae895411e89eab, title = {Multilevel semantic analysis and problem-solving in the flight domain}, author = {Chien, R. T. and Chen, D. C. and Ho, W. P. C. and Pan, Y. C.}, year = {1982}, url = {https://ntrs.nasa.gov/citations/19820024091}, note = {Source identifier: 19820024091} }