Bibliography: p589-593. _ Includes index.
A flora of Cumbria : comprising the vice-counties of Westmorland with Furness, v.c.69, Cumberland, v.c.70, and parts of North-west Yorkshire, v.c.65 and North Lancashire, v.c.60 by Geoffrey Halliday. ISBN 1862200203. Published by Centre for North-West Regional Studies, University of Lancaster in 1997. Publication and catalogue information, links to buy online and reader comments.