Abstract
After the enclosure of the Delta-area the appearance of fog will not change in this area. The distance of vision greater than 1000 meters may get another frequency-division.
After the enclosure of the Delta-area the appearance of fog will not change in this area. The distance of vision greater than 1000 meters may get another frequency-division.
Den Haag, Rijkswaterstaat, 1963, 27 p., graph.
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