No abstract provided.

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  • Supplemental Notes:
    • 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.
  • Authors:
    • Marshall, R
  • Publication Date: 1951

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Filing Info

  • Accession Number: 00204997
  • Record Type: Publication
  • Report/Paper Numbers: pp 57-58
  • Files: TRIS, TRB
  • Created Date: Dec 6 1971 12:00AM