Wetlands, status and trends in the conterminous United States, mid-1970's to mid-1980's :  first update of the national wetlands status report / 
by Thomas E. Dahl and Craig E. Johnson ; statistical data analysis by W.E. Frayer 
 - Washington, D.C. :  U.S. Dept. of the Interior, Fish and Wildlife Service :  For sale by the U.S. G.P.O., Supt. of Docs.,  1991 
 - vi, 22 p. :  ill. (some col.) ;  28 cm. 
<br/><br/>Includes bibliographical references (p. 16) 
<br/><br/><label>ISBN: </label>0160359163  Hadiah 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Wetlands--United States<br/>Wetland conservation--United States