@misc{indiciaea3ca686069b2,
  title = {Preparative free-flow electrophoresis as a method of fractionation of natural organic materials},
  author = {J.A. Leenheer and Ronald L. Malcolm},
  year = {1973},
  doi = {10.3133/wsp1817d},
  url = {https://pubs.usgs.gov/publication/wsp1817D},
  note = {Source identifier: wsp1817D}
}