@book{32759,
	author = {Schäfer, Klaus, ed.},
	title = {Spectroscopic Atmospheric Environmental Monitoring Techniques},
	publisher = {SPIE},
	year = {1998},
	series = {Proceedings of SPIE; V. 3493},
	address = {Washington, USA},
	url = {https://www.spiedigitallibrary.org/conference-proceedings-of-spie/3493}
}