@book{31071,
	author = {Case, Harry, ed.},
	title = {Photo-Optical Instrumentation: A Tool for Solving Traffic and Highway Engineering Problems},
	publisher = {SPIE},
	year = {1972},
	series = {Proceedings of SPIE; V. 0030},
	address = {Washington, USA},
	url = {https://www.spiedigitallibrary.org/conference-proceedings-of-spie/0030}
}