Abstract
Textbook of spinal disorder S Esses (editor), 352 pages, Lippincott Company, Philadelphia, 1995 ISBN 0-397-5 1 346-1
Essentials of the spine J Weinstein, B Rydevik, V Sonntag (editors), 267 pages, Raven Press, New York, 1995 ISBN 0-7817-0251-8