Trafficability Classification of Thailand Soils, report, January 1967; (https://digital.library.unt.edu/ark:/67531/metadc303906/m1/1/: accessed April 15, 2024), University of North Texas Libraries, UNT Digital Library, digital.library.unt.edu; .
Trafficability Classification of Thailand Soils, report, January 1967; (https://digital.library.unt.edu/ark:/67531/metadc303906/m1/1/: accessed April 15, 2024), University of North Texas Libraries, UNT Digital Library, digital.library.unt.edu; .