TY - RPRT TI - A dynamic systems engineering methodology research study. Phase 2: Evaluating methodologies, tools, and techniques for applicability to NASA's systems projects AU - Paul, Arthur S. AU - Gill, Tepper L. AU - Maclin, Arlene P. PY - 1989 UR - https://ntrs.nasa.gov/citations/19900005669 ID - 19900005669 ER -