@book{26599,
	author = {Langenbeck, Peter, ed.},
	title = {In-Process Optical Metrology for Precision Machining},
	publisher = {SPIE},
	year = {1987},
	series = {Proceedings of SPIE; V. 0802},
	address = {Washington, USA},
	url = {https://www.spiedigitallibrary.org/conference-proceedings-of-spie/0802}
}