@book{23427,
	author = {Henkel, Paul, ed.},
	title = {Airborne Reconnaissance IX},
	publisher = {SPIE},
	year = {1985},
	series = {Proceedings of SPIE; V. 0561},
	address = {Washington, USA},
	url = {https://www.spiedigitallibrary.org/conference-proceedings-of-spie/0561}
}