1
2
[Washington, D.C.?] : U.S. Dept. of Transportation, Research and Special Programs Administration, 1987
Rev. as of Nov. 1, 1986.
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3
by Borlaug, Karen L.
Washington : Dept. of Transportation, Research and Special Programs Administration, 1978
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4
5
6
[Washington, D.C.?] : U.S. Dept. of Transportation, Research and Special Programs Administration, 2000
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8
9
[Washington, D.C.?] : U.S. Dept. of Transportation, Research and Special Programs Administration, 1994
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10
Washington, DC : Departamento de Transporte de los E.U.A., Adminstración de Investigación y Programas Especiales, 2003
03/03 ed.
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Washington, DC : U.S. Dept. of Transportation, Research and Special Programs Administration, 2003
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[Washington, D.C.?] : U.S. Dept. of Transportation, Research and Special Programs Administration, 1999
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13
[Washington, DC] : [Springfield, VA] : U.S. Dept. of Transportation, Research and Special Programs Administration ; [Available to the public through the National Technical Information Service], 1999
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[Washington, D.C.?] : U.S. Dept. of Transportation, Research and Special Programs Administration, 2000
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[Washington, D.C.] : U.S. Dept. of Transportation, Research and Special Programs Administration, 1996
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18
19
[Washington, D.C.?] : U.S. Dept. of Transportation, Research and Special Programs Administration, 1998
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