R. EDWARD MINCHIN และผู้แต่งคนอื่นๆ. (2014) DEVELOPMENT OF A SYSTEM TO VALIDATE AND CERTIFY EQUIPMENT AND TECHNICIANS FOR UNDERGROUND PIPE INSPECTION. ISEC Press:ม.ป.ท.R. EDWARD MINCHIN และผู้แต่งคนอื่นๆ. 2014. DEVELOPMENT OF A SYSTEM TO VALIDATE AND CERTIFY EQUIPMENT AND TECHNICIANS FOR UNDERGROUND PIPE INSPECTION. ม.ป.ท.:ISEC Press;R. EDWARD MINCHIN และผู้แต่งคนอื่นๆ. DEVELOPMENT OF A SYSTEM TO VALIDATE AND CERTIFY EQUIPMENT AND TECHNICIANS FOR UNDERGROUND PIPE INSPECTION. ม.ป.ท.:ISEC Press, 2014. Print.