Some books that look interesting:

 

“The Illustrated Encyclopedia of Essential Oils”, by Julia Lawless, 1995,

 ISBN: 1-85-230-721-8

 

“The Complete Book of Essential Oils and Aromatherapy, by Valerie Ann Worwood, 1991,

ISBN: 0-931432-82-0

 

“375 Essential Oils and Hydrosols”, by Jeanne Rose, 1999,

ISBN: 1-883319-89-7

 

“The Essential Oils Book: Creating Personal Blends for Mind and Body”, by Colleen K. Dodt, 1996

ISBN: 0-882669-13-3

 

Books we used:

 

“Pocket Guide to Aromatherapy”, by Kathi Keville, 1996

ISBN: 0-89594-815-X

 

“Secrets of Aromatherapy”, by Jennie Harding, 2000

ISBN: 0-7894-6773-9