TY  - RPRT
TI  - Summary of the National Atmospheric Deposition Program/National Trends Network intersite-comparison program, November 1978-November 1989
AU  - J.D. Gordon
AU  - T. C. Willoughby
AU  - L.J. Schroder
PY  - 1991
DO  - 10.3133/wri914061
UR  - https://pubs.usgs.gov/publication/wri914061
ID  - wri914061
ER  -