TY  - RPRT
TI  - Results of external quality-assurance program for the National Atmospheric Deposition Program and National Trends Network during 1985
AU  - M. H. Brooks
AU  - L.J. Schroder
AU  - T. C. Willoughby
PY  - 1988
DO  - 10.3133/wri874219
UR  - https://pubs.usgs.gov/publication/wri874219
ID  - wri874219
ER  -