TY  - ART
TI  - 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 481
PY  - 1977
UR  - https://www.biodiversitylibrary.org/page/41747561
ID  - page-41747561
ER  -