@book{23403,
	author = {Fabian, Peter, ed.},
	title = {Air Pollution and Visibility Measurements},
	publisher = {SPIE},
	year = {1995},
	series = {Proceedings of SPIE; V. 2506},
	address = {Washington, USA},
	url = {https://www.spiedigitallibrary.org/conference-proceedings-of-spie/2506}
}