Peterson, Roger Tory,  1908- <br/><br/>
A field guide to the birds of Britain and Europe / 
Roger Peterson, Guy Mountfort, P. A. D. Hollom. 
 - 4th ed. 
 - London :  Collins,  1983. 
 - 241 p. :  ill. ;  19 cm. 
<br/><br/> Open access. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Birds--Europe--Identification.<br/>Birds--Great Britain--Identification.