@misc{indiciae68d5249772ae,
  title = {Track/train dynamics test report transfer function test. Volume 4: Data book, x-axis tests, actuators 180 deg out of phase. Run 30. z-axis tests, single actuator. Run 46},
  year = {1975},
  url = {https://ntrs.nasa.gov/citations/19750025331},
  note = {Source identifier: 19750025331}
}