Perry, Roger. <br/><br/>
Charles Darwin Research Station, Galápagos: Scientific and conservation report no. 16-20. 
Roger Perry. 
 -  1969. 
 - 1-40 p. 
<br/><br/>   BIB Now: 5520; 5521; 5526; 5527; 5528 
<br/><br/><br/>Inglés 
<br/><br/><label>Dewey Class. No.: </label>506