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551. Vermont, transportation map, highways, railroads, canals, air lanes, and dredged channels; highways corrected to Jan. 1, 1939. Scale 1:250,000, approximately 1 in.=4 m.

Corporate/Agency Authors:: Public Roads Bureau and Agriculture Department
Publisher:: Public Roads Bureau
Date:: 1939
SuDoc number:: A 22.9/2:V 59/2/sh.1, 2

552. Virginia. Federal aid highway system, progress map: [Virginia]; data corrected to Dec. 1, 1938. Scale 1:500,000 or 1 in.=7.891 m.

Corporate/Agency Authors:: Public Roads Bureau and Agriculture Department
Publisher:: Public Roads Bureau
Date:: [1939]
SuDoc number:: A 22.9:V 81/8/N, SE, SW

553. West Virginia. Federal aid highway system, progress map: [West Virginia]; data corrected to Oct. 1, 1938. Scale 1:500,000 or 1 in.=7.891 m.

Corporate/Agency Authors:: Public Roads Bureau and Agriculture Department
Publisher:: Public Roads Bureau
Date:: [1939]
SuDoc number:: A 22.9:W 52 v/9/E, W

554. Wisconsin, transportation map, highways, railroads, canals, air lanes, and dredged channels; highways corrected to Apr. 1, 1939. Scale 1:250,000, approximately 1 in.=4 m.

Corporate/Agency Authors:: Public Roads Bureau
Publisher:: Public Roads Bureau
Date:: 1939
SuDoc number:: A 22.9/2:W 75/sh.1-9

555. Cellars. Making cellars dry; [by George M. Warren].

Corporate/Agency Authors:: Public Roads Bureau and Agriculture Department
Publisher:: Public Roads Bureau
Date:: [July 1929, slightly revised June 1938.] [1938.]
SuDoc number:: A 1.9:1572/2

556. Safety of life. Bibliography on highway safety; compiled by Mildred A. Wilson.

Corporate/Agency Authors:: Public Roads Bureau and Agriculture Department
Publisher:: Public Roads Bureau
Date:: Feb. 1938
SuDoc number:: A 1.38:296

557. Alabama. Federal aid highway system, progress map: [Alabama]; data corrected to Sept. 1, 1937. Scale 1:500,000 or 1 in. =7.891 m.

Corporate/Agency Authors:: Public Roads Bureau and Agriculture Department
Publisher:: Public Roads Bureau
Date:: [1938.]
SuDoc number:: A 22.9:Al 1/8/C,N,S

558. Arkansas. Federal aid highway system, progress map: [Arkansas]; data corrected to July 1, 1937. Scale 1:500,000 or 1 in=7.891 m.

Corporate/Agency Authors:: Public Roads Bureau and Agriculture Department
Publisher:: Public Roads Bureau
Date:: [1938]
SuDoc number:: A 22.9:Ar 4 k/8/E, NW, SW

559. Colorado. Federal aid highway system, progress map: [Colorado]; data corrected to Jan. 1, 1938. Scale 1: 760,320 or 1 in.=12 m.

Corporate/Agency Authors:: Public Roads Bureau and Agriculture Department
Publisher:: Public Roads Bureau
Date:: [1938.]
SuDoc number:: A 22.9:C 71/8/E,W

560. Flaw of water in drainage channels, results of experiments to determine roughness coefficient n in Kutter's formula; by C. E. Ramser.

Corporate/Agency Authors:: Public Roads Bureau and Agriculture Department
Publisher:: Public Roads Bureau
Date:: Nov. 1929 [reprint 1938.]
SuDoc number:: A 1.36:129/1-2

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