@misc{indiciaea7d22e94dd87,
  title = {The elements of electrical engineering; a text book for technical schools and colleges. Vol. II. Alternating currents — Illustration, Page 22},
  year = {1908},
  url = {https://www.biodiversitylibrary.org/page/17500366},
  note = {Source identifier: page-17500366}
}