@misc{indiciaef4e1af498fb7,
  title = {Harnessing the earthworm; a practical inquiry into soil-building, soil-conditioning and plant nutrition through the action of earthworms — Illustration, BHL page 41246867},
  year = {1948},
  url = {https://www.biodiversitylibrary.org/page/41246867},
  note = {Source identifier: page-41246867}
}