TY  - RPRT
TI  - Guidelines for the processing and quality assurance of benthic invertebrate samples collected as part of the National Water-Quality Assessment Program
AU  - T. F. Cuffney
AU  - M. E. Gurtz
AU  - M. R. Meador
PY  - 1993
DO  - 10.3133/ofr93407
UR  - https://pubs.usgs.gov/publication/ofr93407
ID  - ofr93407
ER  -