@book{33498,
	author = {Gerhart, Grant, ed.},
	title = {Unmanned Systems Technology IX},
	publisher = {SPIE},
	year = {2007},
	series = {Proceedings of SPIE; V. 6561},
	address = {Washington, USA},
	url = {https://www.spiedigitallibrary.org/conference-proceedings-of-spie/6561}
}