@book{23430,
	author = {Henkel, Paul, ed.},
	title = {Airborne Reconnaissance VII},
	publisher = {SPIE},
	year = {1984},
	series = {Proceedings of SPIE; V. 0424},
	address = {Washington, USA},
	url = {https://www.spiedigitallibrary.org/conference-proceedings-of-spie/0424}
}