Guenther, Ernest  <br/><br/>
The essential oils :  Vol. 1 History - origin in plants - production - analysis / 
Ernest Guenther. 
 - New York :  Krieger Publ. Company,   1972. 
<br/><br/><label>ISBN: </label>144749654  9781447496540 
<br/><br/><label>Universal Decimal Class. No.: </label>668.5