TY  - RPRT
TI  - Results of the US Geological Survey's second International Interlaboratory Analytical Comparison Study; Standard Reference Water Samples M-86 (major constituents), T-87 (trace constituents), and P-5 (precipitation snowmelt)
AU  - V.J. Janzer
PY  - 1985
DO  - 10.3133/wri854049
UR  - https://pubs.usgs.gov/publication/wri854049
ID  - wri854049
ER  -