Birds in Europe :   population estimates, trends and conservation status /  
compiled by Ian Burfield and Frans van Bommel. 
 - Cambridge :   Birdlife International,  2004. 
 - xxiv, 374 p. :  ill. 
 - Birdlife conservation series ;   12  .
<br/><br/>Bibliography: p. 341-369. 
<br/><br/><label>ISBN: </label>0946888531 
<br/><br/><label>Subjects--Index Terms: </label>ზოოლოგია ჩიტები  ორითოლოგია 
<br/><br/><label>Universal Decimal Class. No.: </label>598.2