Samenvatting
The reports contained in this record provide information on highway emergency communication systems which have been developed and, in some cases, rather extensively tested.
The reports contained in this record provide information on highway emergency communication systems which have been developed and, in some cases, rather extensively tested.
Washington, D.C., Highway Research Board HRB, 1972, V + 45 p., fig., graph., tab., ref.; Highway Research Record HRR ; No. 402.
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