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WA-RD 280.1
Authors: 
Robert D. Holtz, Martin W. Page.
Originator: 
Washington State Transportation Center (TRAC)
Publication Date: 
Sunday, March 31, 1991
WA-RD 279.1
Authors: 
Tom H. Roper, Edward H. Henley.
Originator: 
Washington (State). Dept. of Transportation.
Publication Date: 
Wednesday, September 30, 1992
WA-RD 278.1
Authors: 
Richard Unterman.
Originator: 
Washington State Transportation Center (TRAC)
Publication Date: 
Friday, May 31, 1991
WA-RD 274.1
Authors: 
R. Keith Kay, Joe P. Mahoney, Newton C. Jackson.
Originator: 
Washington State Transportation Center (TRAC)
Publication Date: 
Tuesday, August 31, 1993
WA-RD 272.1
Authors: 
Keith Anderson, Robert Murray.
Originator: 
Washington (State). Dept. of Transportation.
Publication Date: 
Thursday, April 30, 1992
WA-RD 271.1
Authors: 
Rafik Y. Itani, Rachib Nakib, Duane L. Stone.
Originator: 
Washington State Transportation Center (TRAC)
Publication Date: 
Friday, May 1, 1992
WA-RD 270.1
Authors: 
Carlton L. Ho, Sonja S. Norton.
Originator: 
Washington (State). Dept. of Transportation; Washington State University. Dept. of Civil and Environmental Engineering.
Publication Date: 
Sunday, December 1, 1991
WA-RD 269.2
Authors: 
Steven L. Kramer.
Originator: 
Washington State Transportation Center (TRAC)
Publication Date: 
Friday, January 1, 1993
WA-RD 269.1
Authors: 
Steven L. Kramer.
Originator: 
Washington State Transportation Center (TRAC)
Publication Date: 
Friday, January 1, 1993
WA-RD 268.1
Authors: 
Keith W. Anderson, Newton C. Jackson.
Originator: 
Washington (State). Dept. of Transportation.
Publication Date: 
Sunday, March 1, 1992

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