TY  - RPRT
TI  - Primary productivity by phytoplankton in the tidal, fresh Potomac River, Maryland, May 1980 to August 1981
AU  - R.R. Cohen
AU  - S.O. Pollock
PY  - 1983
DO  - 10.3133/wri834255
UR  - https://pubs.usgs.gov/publication/wri834255
ID  - wri834255
ER  -