@misc{indiciaeaa2f2803ec0c,
  title = {Cardiovascular changes during tilt and leg negative pressure tests.},
  author = {Bartok, S. J. and Carlson, L. D. and Walters, R. F.},
  year = {1968},
  url = {https://ntrs.nasa.gov/citations/19690033345},
  note = {Source identifier: 19690033345}
}