@book{30258,
	author = {Halvorson, Craig, ed.},
	title = {Optics and Photonics in Global Homeland Security IV},
	publisher = {SPIE},
	year = {2008},
	series = {Proceedings of SPIE; V. 6945},
	address = {Washington, USA},
	url = {https://www.spiedigitallibrary.org/conference-proceedings-of-spie/6945}
}