@misc{indiciae1501fc3df92d,
  title = {Technical note. An inexpensive servo-controlled "wedge".},
  author = {R H Carpenter},
  year = {1974},
  doi = {10.1016/0042-6989(74)90225-9},
  url = {https://pubmed.ncbi.nlm.nih.gov/4428635/},
  note = {Source identifier: 4428635}
}