1. Ecological and physiological studies on certain aquatic angiosperms;Bourne;Contrib. Boyce Thompson Inst. Plant Res., Inc.,1932
2. Nutrition and grazing behavior of the greem turtle Chelonia mydas;Bjorndal;Mar. Biol.,1980
3. Submersed aquatic plants of the tidal Potomac River;Carter;U.S. Geol. Surv. Bull.,1983
4. Data on the distribution and abundance of submersed aquatic vegetation in the tidal Potomac River and transition zone of the Potomac Estuary, Maryland Virginia and the District of Columbia, 1983 and 1984;Carter;U.S. Geol. Surv. Open-File Rep.,1985
5. Distribution and abundance of submersed aquatic vegetation in the tidal Potomac River and Estuary, Maryland and Virginia, May 1978 to November 1981;Carter;U.S. Geol. Surv. Water-Supply Pap., 2234A,1985