@misc{indiciae2f3cb1f0090a,
  title = {Methods and standards for environmental measurement : proceedings of the 8th Materials Research Symposium held at the National Bureau of Standards, Gaithersburg, Maryland, September 20-24, 1976 — Illustration, Page 428},
  year = {1977},
  url = {https://www.biodiversitylibrary.org/page/41747508},
  note = {Source identifier: page-41747508}
}