Grant, P. R., Grant, B. R., Petren, K. <br/><br/>
The allopatric phase of speciation  the sharp-beaked ground finch (Geospiza difficilis) on the Galápagos Islands. 

 -  2000 
 - 287-317. 
<br/><br/><br/>English 
<br/><br/><label>ISBN: </label> Normal 
<br/><br/><label>Subjects--Index Terms: </label>The allopatric phase of speciation: the sharp-beaked ground finch (Geospiza difficilis) on the Galápagos Islands.  Darwin's finch, sharp-beaked ground finch, Geospiza difficilis, evolution, Galápagos  Pinzón de Darwin, pinzón terrestre de pico agudo, Geospiza difficilis, evolución, Galápagos 
<br/><br/><label>Dewey Class. No.: </label>598.883  598.883