@book{30056,
	author = {Chen, Philip, ed.},
	title = {Optical System Contamination: Effects, Measurements, and Control VII},
	publisher = {SPIE},
	year = {2002},
	series = {Proceedings of SPIE; V. 4774},
	address = {Washington, USA},
	url = {https://www.spiedigitallibrary.org/conference-proceedings-of-spie/4774}
}