Ford, E. B.  1901-1988  <br/><br/>
Butterflies / 
E. B. Ford. 
 - Third Edition 
 - London :  Collins,  1957. 
 - xiv, 368 p. ;  il. ;  23 cm. 
 - The New naturalist; a survey of British natural history .
<br/><br/>Bibliografía: p. 334-336. 
<br/><br/><br/>Inglés 
<br/><br/><label>LCCN: </label>47003794  
<br/><br/><label>Subjects--Index Terms: </label>Butterflies Mariposas 
<br/><br/><label>Dewey Class. No.: </label>595.789