@book{28903,
	author = {Speigle, Scott, ed.},
	title = {Navigation and Control Technologies for Unmanned Systems II},
	publisher = {SPIE},
	year = {1997},
	series = {Proceedings of SPIE; V. 3087},
	address = {Washington, USA},
	url = {https://www.spiedigitallibrary.org/conference-proceedings-of-spie/3087}
}