@book{25812,
	author = {Lippert, Thomas, ed.},
	title = {Helmet-Mounted Displays III},
	publisher = {SPIE},
	year = {1992},
	series = {Proceedings of SPIE; V. 1695},
	address = {Washington, USA},
	url = {https://www.spiedigitallibrary.org/conference-proceedings-of-spie/1695}
}