FWS/OBS-77/09. THE ECOLOGICAL EFFECTS OF 1977. 61 pp. Superseded FWS/OBS-78/2.2. FWS/OBS-77/11. FWS/OBS-77/14. ENVIRONMENTAL FWS/0BS-77/14. Fish and Wildlife Service, U.S. Department of the Interior: Washington, D.C. Gulf South Research Institute. 1977. Coastal Marsh Productivity. 1933-1950 3110952335 en fran