TY - RPRT TI - Absolute Thickness Measurements on Coatings Without Prior Knowledge of Material Properties Using Terahertz Energy AU - Roth, Don J. AU - Cosgriff, Laura M. AU - Harder, Bryan AU - Zhu, Dongming AU - Martin, Richard E. PY - 2013 UR - https://ntrs.nasa.gov/citations/20140010691 ID - 20140010691 ER -