@misc{indiciae898b8b80f269,
  title = {Long-term deep-ocean test of concrete spherical structures. fabrication, emplacement, and initial inspection. Part I — Illustration, Page 4},
  year = {1974},
  url = {https://www.biodiversitylibrary.org/page/32766162},
  note = {Source identifier: page-32766162}
}