@misc{indiciae306442ea8c0a,
  title = {Investigations on microscopic foams and on protoplasm. Experiments \& observations directed towards a solution of the question of the physical conditions of the phenomena of life — Illustration, BHL page 17018558},
  year = {1894},
  url = {https://www.biodiversitylibrary.org/page/17018558},
  note = {Source identifier: page-17018558}
}