@book{22606,
	author = {Lawrence, George, ed.},
	title = {1990 Intl Lens Design Conf},
	publisher = {SPIE},
	year = {1991},
	series = {Proceedings of SPIE; V. 1354},
	address = {Washington, USA},
	url = {https://www.spiedigitallibrary.org/conference-proceedings-of-spie/1354}
}