@book{30059,
	author = {Chen, Philip, ed.},
	title = {Optical Systems Contamination and Degradation},
	publisher = {SPIE},
	year = {1998},
	series = {Proceedings of SPIE; V. 3427},
	address = {Washington, USA},
	url = {https://www.spiedigitallibrary.org/conference-proceedings-of-spie/3427}
}