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1948
CERTAIN STRUCTURAL COMPONENTS OF LETTERS FOR IMPROVING THE EFFICIENCY OF THE STOP SIGN

Highway Research Board Proceedings, Volume 27

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1938
SEEING ON THE HIGHWAY, RECENT RESEARCHES ON LIGHTING REQUIREMENTS

Highway Research Board Proceedings, Volume 17

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1935
EFFECTIVENESS OF VARIOUS HIGHWAY SIGNS

Highway Research Board Proceedings, Volume 14

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1934
REVIEW OF DATA ON BITUMINOUS COATINGS AND RELATION OF TEMPERATURE TO CURING METHODS

Highway Research Board Proceedings, Volume 13

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1928
COLOR AND FORM OF TRAFFIC SIGNALS AND SIGNS IN RELATION TO SAFETY

Highway Research Board Proceedings, Volume 7

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Showing 201 - 205 of 205 records