Bulgarian ramsar sites/ 
Ramsar  Convention on Wetlands (Ramsar, Iran 1971) 
 - p.: col. ill., maps ;  29 cm. 
<br/><br/> Text in Bulgarian and English. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Wetlands -- Bulgaria<br/>Wetland ecology -- Bulgaria<br/>Wetland conservation -- Bulgaria<br/>Key Biodiversity Areas (KBA) -- Bulgaria<br/>Red List -- Bulgaria<br/>Biogeography -- Bulgaria<br/>Nature literacy
<br/><br/><label>Dewey Class. No.: </label>Sulak 577.68  / BU