@book{24628,
	author = {Wuerker, Ralph, ed.},
	title = {Developments in Laser Technology II},
	publisher = {SPIE},
	year = {1974},
	series = {Proceedings of SPIE; V. 0041},
	address = {Washington, USA},
	url = {https://www.spiedigitallibrary.org/conference-proceedings-of-spie/0041}
}