TY - RPRT TI - Water quality of the tidal Potomac River and Estuary; hydrologic data report, 1981 water year, with a section on collection and analysis of chlorophyll-a AU - Stephen F. Blanchard AU - Richard H. Coupe AU - Joan C. Woodward PY - 1982 DO - 10.3133/ofr82575 UR - https://pubs.usgs.gov/publication/ofr82575 ID - ofr82575 ER -