@misc{indiciaec672d69c1ff7,
  title = {Operating manual for the miniservo-control tester},
  author = {W.L. Rapp},
  year = {1986},
  doi = {10.3133/ofr85690},
  url = {https://pubs.usgs.gov/publication/ofr85690},
  note = {Source identifier: ofr85690}
}