United States. Public Roads Administration. (1949). Highway practice in the United States of America: History, administration, finance, systems and standards, location and design, construction and maintenance. U.S. Govt. Print. Off..
Citace podle Chicago (17th ed.)United States. Public Roads Administration. Highway Practice in the United States of America: History, Administration, Finance, Systems and Standards, Location and Design, Construction and Maintenance. Washington,: U.S. Govt. Print. Off., 1949.
Citace podle MLA (8th ed.)United States. Public Roads Administration. Highway Practice in the United States of America: History, Administration, Finance, Systems and Standards, Location and Design, Construction and Maintenance. U.S. Govt. Print. Off., 1949.
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