Rix, Martin. The Bulb Book : A Photographic Guide to Over 800 Hardy Bulbs. / M. Rix & R. Phillips.; Edt. by B. Mathew. - First Edition - London : Pan Books Ltd, 1981. - 192 p. : ill. Includes Bibliographical References. ISBN: 0-330-26481-8 Subjects--Topical Terms: Botany