Harwood, Robert Frederick <br/><br/>
Entomology in human and animal health / 
Harwood, Robert Frederick 
 - 7ta. ed. 
 - New York :  Macmillan Publishing,  1979. 
 - 548 p. 
<br/><br/><label>ISBN: </label>0-02-351600-3 
<br/><br/><label>Dewey Class. No.: </label>614.4'32  / H254e