@book{26617,
	author = {Crawford, David, ed.},
	title = {Instrumentation in Astronomy VII},
	publisher = {SPIE},
	year = {1990},
	series = {Proceedings of SPIE; V. 1235},
	address = {Washington, USA},
	url = {https://www.spiedigitallibrary.org/conference-proceedings-of-spie/1235}
}