@book{29080,
	author = {Valley, Michael, ed.},
	title = {Nondestructive Inspection of Aging Aircraft},
	publisher = {SPIE},
	year = {1993},
	series = {Proceedings of SPIE; V. 2001},
	address = {Washington, USA},
	url = {https://www.spiedigitallibrary.org/conference-proceedings-of-spie/2001}
}