Guenther, Ernest  1895- <br/><br/>
The essential oils / 
by Ernest Guenther and others. 
 - 6 volumes :  illustration, diagrams ;  24 cm 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>Subjects--Index Terms: </label>Essences and essential oils 
<br/><br/><label>LC Class. No.: </label>TP958  / .G77