TY  - RPRT
TI  - Updated operational protocols for the U.S. Geological Survey Precipitation Chemistry Quality Assurance Project in support of the National Atmospheric Deposition Program
AU  - Gregory A. Wetherbee
AU  - RoseAnn Martin
PY  - 2017
DO  - 10.3133/ofr20161213
UR  - https://pubs.usgs.gov/publication/ofr20161213
ID  - ofr20161213
ER  -