Richardson, B. S.; Haley, D. C.; Dudar, A. M. & Ward, C. R. A Mobile Automated Characterization System (MACS) for indoor floor characterization, article, March 1, 1995; (https://digital.library.unt.edu/ark:/67531/metadc678764/m1/1/: accessed April 25, 2024), University of North Texas Libraries, UNT Digital Library, digital.library.unt.edu; .