Samenvatting
The year intensities of traffic are given on 10 permanent counting posts in the province of Groningen during 1971. The increase of traffic in 1971 to 1970 is about 14.4%.
The year intensities of traffic are given on 10 permanent counting posts in the province of Groningen during 1971. The increase of traffic in 1971 to 1970 is about 14.4%.
Groningen, 1971, 16 p., graph., tab., tekn.
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