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WA-RD 411.1
Authors: 
Daniel J. Dailey, Mark P. Haselkorn, Po-Jung Lin.
Originator: 
Washington State Transportation Center (TRAC)
Publication Date: 
Sunday, September 1, 1996
WA-RD 543.1
Authors: 
Daniel J. Dailey.
Originator: 
Washington State Transportation Center (TRAC)
Publication Date: 
Friday, March 1, 2002
WA-RD 565.1
Authors: 
Daniel J. Dailey.
Originator: 
Washington State Transportation Center (TRAC)
Publication Date: 
Tuesday, April 1, 2003