@book{25730,
	author = {Thiel, Frank, ed.},
	title = {Guided Optical Communications},
	publisher = {SPIE},
	year = {1975},
	series = {Proceedings of SPIE; V. 0063},
	address = {Washington, USA},
	url = {https://www.spiedigitallibrary.org/conference-proceedings-of-spie/0063}
}