Mayr, Ernst <br/><br/>
Populations, species, and evolution  : an abridgment of animal species and evolution 
Ernst Mayr 
 - 2nd ed 
 - Cambridge, Massachusetts  Belknap Press of Harvard University Press  1971 
 - XV, 453 p.  25 cm 
<br/><br/><label>ISBN: </label>674690133 
<br/><br/><label>Subjects--Index Terms: </label>Especies Evolucion