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1953. Fall Migration of the Black Duck. 
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Austin, O. L., Jr. 
1932. The Breeding of the Blue-winged 
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Coast and Geodetic Survey. 
1957. Tide Tables: High and Low Predic- 
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1944, Food Habits and Management of 
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Cottam, Clarence, and David A, Munro. 
1954. Eelgrass Status and Environmental 
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Edmondson, W, T, (Editor) 
1959. Ward and Whipple's Fresh-water Bi- 
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1950. Gray's Manual of Botany. American 
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1950. Field Book of Seashore Life. G, P. 
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Morris, P, A, 
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1956. Distinction of Maritime and Prairie 
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