The international road roughness experiment : establishing correlation and a calibration standard for measurements /
Michael W. Sayers, Thomas D. Gillespie, and Cesar A.V. Queiroz.
- Washington, D.C. : World Bank (WB) , 1986
- ix, 453p. : ill. ; 28 cm.
- World Bank technical paper, no. 45 0253-7494 ; .
"A collaborative study undertaken by The University of Michigan Transportation Research Institute ... [et al.]."