Birkhead, Tim. <br/><br/>
The magpies :  the ecology and behaviour of black-billed and yellow -billed Magpies / 
by Tim Birkhead. 
 - London :  T & A D Poyse,  1991. 
 - 270 p. :  ill. 
<br/><br/><label>ISBN: </label>0856610674 
<br/><br/><label>LCCN: </label>92034364     
<br/><br/><label>Subjects--Topical Terms: </label><br/>Magpies.<br/>Yellow-billed magpie.