Fet, Victor. <br/><br/>
Biogeography and Ecology of Bulgaria [electronic resource]   
by Victor Fet 
 - Dordrecht  Springer  2007 
<br/><br/> http://dx.doi.org/10.1007/978-1-4020-5781-6 
<br/><br/><label>ISBN: </label>9781402057816 
<br/><br/><label>Dewey Class. No.: </label>578.09499  / (e-book)