@book{29077,
	author = {Prager, Martin, ed.},
	title = {Nondestructive Evaluation of Utilities and Pipelines},
	publisher = {SPIE},
	year = {1996},
	series = {Proceedings of SPIE; V. 2947},
	address = {Washington, USA},
	url = {https://www.spiedigitallibrary.org/conference-proceedings-of-spie/2947}
}