@misc{indiciae69565da842e2,
  title = {Variable Gravity Research Facility - A concept},
  author = {Wercinski, Paul F. and Smith, Marcie A. and Synnestvedt, Robert G. and Keller, Robert G.},
  year = {1990},
  url = {https://ntrs.nasa.gov/citations/19910043088},
  note = {Source identifier: 19910043088}
}