@misc{indiciaef03de8888688,
  title = {Inertial instrument system for aerial surveying},
  author = {R. H. Brown and W.H. Chapman and W. F. Hanna and C.E. Mongan and J.W. Hursh},
  year = {1985},
  doi = {10.3133/ofr85184},
  url = {https://pubs.usgs.gov/publication/ofr85184},
  note = {Source identifier: ofr85184}
}