@book{30061,
	author = {Glassford, A. Peter, ed.},
	title = {Optical Systems Contamination: Effects, Measurement, Control},
	publisher = {SPIE},
	year = {1987},
	series = {Proceedings of SPIE; V. 0777},
	address = {Washington, USA},
	url = {https://www.spiedigitallibrary.org/conference-proceedings-of-spie/0777}
}