David Knight <br/><br/>
Alfred Russell Wallace Contributions to the theory of Natural Selection, 1870, and Charles Darwin and Alfred Wallace , 'On the Tendency of Species to form Varieties' (Papers presented to the Linnean Society 30th June 1858) 

 -  Taylor and Francis  2003 
<br/><br/><label>ISBN: </label>9780203492604 
<br/><br/><label>Source: </label>EBOOK