@book{24627,
	author = {Emens, Fred, ed.},
	title = {Developments in Laser Technology I},
	publisher = {SPIE},
	year = {1969},
	series = {Proceedings of SPIE; V. 0020},
	address = {Washington, USA},
	url = {https://www.spiedigitallibrary.org/conference-proceedings-of-spie/0020}
}