TY  - RPRT
TI  - Biology as an integrated component of the U.S. Geological Survey's National Water-Quality Assessment Program
AU  - Michael R. Meador
AU  - Martin E. Gurtz
PY  - 1994
DO  - 10.3133/ofr9483
UR  - https://pubs.usgs.gov/publication/ofr9483
ID  - ofr9483
ER  -