Classification of wetlands and deepwater habitats of the United States / 
Lewis M. Cowardin ... [et al.] 
 - Washington :  Fish and Wildlife Service,  1979 
 - vi, 131 p. :  ill. ;  26 cm. 
<br/><br/><label>ISBN: </label> Hadiah 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Wetlands--Classification--United States<br/>Wetland ecology--United States<br/>Aquatic ecology--United States