@book{23257,
	author = {Stitch, Malcolm, ed.},
	title = {Advances in Laser Engineering I},
	publisher = {SPIE},
	year = {1977},
	series = {Proceedings of SPIE; V. 0122},
	address = {Washington, USA},
	url = {https://www.spiedigitallibrary.org/conference-proceedings-of-spie/0122}
}