Ramsar sites in Switzerland / 
Verena Keller 
 - Switzerland :  Federal Office of Environment, Forests and Landscape,  1996 
 - 21 p. :  ill. ;  28 cm. 
<br/><br/><label>ISBN: </label> Hadiah 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Wetland ecology--Switzerland<br/>Wetland conservation--Switzerland<br/>Wetlands--Switzerland