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  • Supplemental Notes:
    • No 613, pp 71-72. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved.
  • Publication Date: 1958

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  • Accession Number: 00205115
  • Record Type: Publication
  • Files: TRIS, TRB
  • Created Date: Nov 22 1971 12:00AM