@misc{indiciae0715eefddff6, title = {First level release of 2GCHAS for comprehensive helicopter analysis}, author = {Ormiston, Robert A. and Ruzicka, Gene C. and Tan, Carina M. and Rutkowski, Michael J.}, year = {1991}, url = {https://ntrs.nasa.gov/citations/19920073715}, note = {Source identifier: 19920073715} }