@misc{HelmerichNiederleithinger2005, author = {Rosemarie Helmerich and Ernst Niederleithinger}, title = {Non-destructive techniques for the condition assessment of railway bridges}, booktitle = {Concrete repair, rehabilitation and retrofitting - proceedings of the International Conference on Concrete Repair, Rehabilitation and Retrofitting}, editor = {M. Alexander}, isbn = {0-415-39654-9}, type = {bookpartcollection}, pages = {163-165 / 429-435 (CD-ROM)}, year = {2005}, }