Contains revised and updated material from: Plant crib /compiled by T.C. Rich and M.D.B. Rich. 1988 _ Guide to the identification of some of the more difficult vascular plant species / M.J. Wigginton, C.G. Graham. Banbury : Nature Conservancy Council, 1981 _ The BM fern crib / Jermy and Camus. S.l. : s.n., 1987.
Includes index.
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Plant crib 1998 by T. C. G. Rich. ISBN 0901158283. Published by Botanical Society of the British Isles. Publication and catalogue information, links to buy online and reader comments.
