TY  - RPRT
TI  - Guidelines for preparing a quality assurance plan for district water-quality activities of the U. S. Geological Survey
AU  - LeRoy J. Schroder
AU  - William J. Shampine
PY  - 1995
DO  - 10.3133/ofr95108
UR  - https://pubs.usgs.gov/publication/ofr95108
ID  - ofr95108
ER  -