@misc{indiciae3b1367bee11e,
  title = {An illuminator for observing and photographing precipitin reactions in agar},
  author = {G.W. Klontz and G.J. Ridgway and G.P. Wilson},
  year = {1960},
  url = {https://pubs.usgs.gov/publication/70161104},
  note = {Source identifier: 70161104}
}