@book{30682,
	author = {Wilkerson, Gary, ed.},
	title = {Passive Materials for Optical Elements II},
	publisher = {SPIE},
	year = {1993},
	series = {Proceedings of SPIE; V. 2018},
	address = {Washington, USA},
	url = {https://www.spiedigitallibrary.org/conference-proceedings-of-spie/2018}
}