@book{33704,
	author = {Beiser, Leo, ed.},
	title = {Visual Simulation and Image Realism I},
	publisher = {SPIE},
	year = {1978},
	series = {Proceedings of SPIE; V. 0162},
	address = {Washington, USA},
	url = {https://www.spiedigitallibrary.org/conference-proceedings-of-spie/0162}
}