Gray, Shirley W. 
Wetlands / 
by Shirley W. Gray. 
 - Minneapolis, Minn. :  Compass Point Books,  c2001. 
 - 48 p. :  col. ill. ;  23 cm. 
 - First reports .
Includes bibliographical references (p. 47)  and index. 
 Examines swamps, marshes, and other kinds of wetlands, plants and animals that live there, and environmental threats. 
0756500257 (hardcover : lib. bdg.) 
00008536 
Wetland ecology.
Ecology.
Wetlands.
QH541.5.M3  / G73 2001 
577.68