@book{109678,
	author = {Hildebrand, and Mees, Hendrik Coenraad,},
	title = {El la "Camera obscura"},
	publisher = {Project Gutenberg,},
	year = {2022},
	address = {Salt Lake City, UT :},
	note = {Wikipedia page about this book: https://eo.wikipedia.org/wiki/El_la_Camera_Obscura},
	url = {https://dlibra.kul.pl/dlibra/publication/51934/}
}