@book{23256,
	author = {Stitch, Malcolm, ed.},
	title = {Advances in Laser Engineering and Applications},
	publisher = {SPIE},
	year = {1980},
	series = {Proceedings of SPIE; V. 0247},
	address = {Washington, USA},
	url = {https://www.spiedigitallibrary.org/conference-proceedings-of-spie/0247}
}