@misc{indiciae87c0c447d380, title = {Space Shuttle Orbiter auxiliary power unit status}, author = {Reck, M. and Loken, G. and Horton, J. and Lukens, W. and Scott, W. and Baughman, J. and Bauch, T.}, year = {1991}, url = {https://ntrs.nasa.gov/citations/19920062818}, note = {Source identifier: 19920062818} }