@misc{indiciaeaa431618abe1,
  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 37552104},
  year = {1894},
  url = {https://www.biodiversitylibrary.org/page/37552104},
  note = {Source identifier: page-37552104}
}