@book{26312,
	author = {Urbach, John, ed.},
	title = {Imaging Techniques for Testing and Inspection},
	publisher = {SPIE},
	year = {1972},
	series = {Proceedings of SPIE; V. 0029},
	address = {Washington, USA},
	url = {https://www.spiedigitallibrary.org/conference-proceedings-of-spie/0029}
}