@misc{indiciae08e504c70c3f,
  title = {Environment, semantics, and system theory in ecology.},
  author = {D A Maelzer},
  year = {1965},
  doi = {10.1016/0022-5193(65)90018-4},
  url = {https://pubmed.ncbi.nlm.nih.gov/5875310/},
  note = {Source identifier: 5875310}
}