@book{30050,
	author = {Glassford, A. Peter, ed.},
	title = {Optical System Contamination: Effects, Measurement, Control II},
	publisher = {SPIE},
	year = {1990},
	series = {Proceedings of SPIE; V. 1329},
	address = {Washington, USA},
	url = {https://www.spiedigitallibrary.org/conference-proceedings-of-spie/1329}
}