@misc{indiciae12c99ded9c79,
  title = {A multipurpose ventricular actuating system.},
  author = {Gebben, V. D. and Webb, J. A., Jr.},
  year = {1969},
  url = {https://ntrs.nasa.gov/citations/19690064994},
  note = {Source identifier: 19690064994}
}