@book{31073,
	author = {Emens, Fred, ed.},
	title = {Photo-Optical Systems Evaluation},
	publisher = {SPIE},
	year = {1967},
	series = {Proceedings of SPIE; V. 0009},
	address = {Washington, USA},
	url = {https://www.spiedigitallibrary.org/conference-proceedings-of-spie/0009}
}