NOTICE: The project that is the subject of this report was approved by the Governing Board of the National Research Council, whose members are drawn from the councils of the National Academy of Sciences, the National Academy of Engineering, and the Institute of Medicine. The members of the committee responsible for the report were chosen for their special competences and with regard for appropriate balance.
Support for this project was provided by the Library of Congress under contract No. C-LC98046. Any opinions, findings, conclusions, or recommendations expressed in this material are those of the authors and do not necessarily reflect the views of the sponsor.
Library of Congress Card Number 00-111489
International Standard Book Number 0-309-07144-5
Additional copies of this report are available from:
National Academy Press
2101 Constitution Ave., NW Box 285 Washington, DC 20055 800-624-6242 202-334-3313 (in the Washington metropolitan area) http://www.nap.edu
Copyright 2000 by the National Academy of Sciences. All rights reserved.
Printed in the United States of America