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1940
/SOIL-CEMENT/ CONSTRUCTION IN THE HILLS OF MARYLAND

Highway Research Board Proceedings, Volume 19

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1940
EFFECT OF TRAFFIC DELAYS ON GASOLINE CONSUMPTION

Highway Research Board Proceedings, Volume 19

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1940
1939-01
REPORT OF SUBCOMMITTEE ON SLOPE EROSION

Highway Research Board Roadside Development Committee Reports

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1939-01
REPORT OF SUBCOMMITTEE ON ZONING

Highway Research Board Roadside Development Committee Reports

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1939
OPERATING SPEEDS AND SPEED ZONING

Rural Traffic Problems

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1939
1939
1939
SPECIAL HAZARD WARNING SIGNS

Rural Traffic Problems

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1939
SUMMARY DISCUSSION OF EROSION CONTROL ON HIGHWAYS

Highway Research Board Proceedings, Volume 18

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1939
EROSION CONTROL IN ILLINOIS

Highway Research Board Proceedings, Volume 18

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