Samenvatting
For abstracts of papers presented at the conference See A 5744 - A 5754 and IRRD Abstracts Nos. 50920 - 50931.
For abstracts of papers presented at the conference See A 5744 - A 5754 and IRRD Abstracts Nos. 50920 - 50931.
Washington, D.C., Highway Research Board HRB, 1970, 55 p.; HRB Special Report ; No. 111
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