The Plant Lover's Guide to Clematis (The Plant Lover's Guides): Beutler, Linda: 9781604696592: Amazon.com: Books
A Comprehensive Guide to Clematis: Fretwell, Barry: 9780004140179: Amazon.com: Books
Clematis: An Illustrated Guide to Varieties, Cultivation and Care, with Step-By-Step Instructions and Over 150 Beautiful Photographs: Mikolajski, Andrew: 9781780192512: Amazon.com: Books