A Guide to species irises :  their identification and cultivation / 
edited by the Species Group of the British Iris Society ; line drawings by Christabel King and maps by William R. Killens 
 - Cambridge ;  New York :  Cambridge University Press,  1997 
 - xv, 371 p., [32] p. of plates :  ill. (some col.), maps ;  24 cm. 
<br/><br/>Includes bibliographical references (p. 297-298) and indexes 
<br/><br/><label>ISBN: </label>9780521206433 (pbk.) 9780521440745 (hardback) 0521440742 (hardback) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Irises (Plants)--Identification<br/>Flower gardening