@misc{indiciae1a9ae63b4f2b,
  title = {Unsteady propeller forces, fundamental hydrodynamics [and] unconventional propulsion — Illustration, Page 1268},
  year = {1971},
  url = {https://www.biodiversitylibrary.org/page/26534076},
  note = {Source identifier: page-26534076}
}