@misc{indiciaecc80ca7ae4cf,
  title = {The elements of electrical engineering; a text book for technical schools and colleges. Vol. II. Alternating currents — Illustration, Page 108},
  year = {1908},
  url = {https://www.biodiversitylibrary.org/page/17500452},
  note = {Source identifier: page-17500452}
}