@book{30060,
	author = {Chen, Philip, ed.},
	title = {Optical Systems Contamination and Degradation II: Effects, Measurements, and Control},
	publisher = {SPIE},
	year = {2000},
	series = {Proceedings of SPIE; V. 4096},
	address = {Washington, USA},
	url = {https://www.spiedigitallibrary.org/conference-proceedings-of-spie/4096}
}