Elton, Charles S.  1900- <br/><br/>
The ecology of invasions by animals and plants / 
Charles S. Elton 
 - London :  Methuen,  1958 
 - 181 p. :  ill.,  maps ;  22 cm. 
<br/><br/>Bibliography: p. 160-174 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ecology<br/>Biogeography<br/>Animal introduction<br/>Plant introduction