@misc{indiciaef7cbcb751b3e,
  title = {Electronic foam controller for fermentors.},
  author = {V F PFEIFER and E N HEGER},
  year = {1957},
  doi = {10.1128/am.5.1.44-47.1957},
  url = {https://pubmed.ncbi.nlm.nih.gov/13403638/},
  note = {Source identifier: 13403638}
}