@incollection{Yeh12, author = {Pei-Ling Liu and Po-Liang Yeh}, title = {Imaging Methods of Concrete Structure Based on Impact-Echo Test}, booktitle = {Nondestructive Testing Methods and New Applications}, publisher = {IntechOpen}, address = {Rijeka}, year = {2012}, editor = {Mohammad Omar}, chapter = {10}, doi = {10.5772/35954}, url = {https://doi.org/10.5772/35954} }