@book{116326,
	author = {Le Bon, Gustave,},
	title = {Hier et demain},
	publisher = {Project Gutenberg,},
	year = {2025},
	address = {Salt Lake City, UT :},
	note = {Release date is 2025-03-12},
	url = {https://polona.pl/preview/3ad0683e-c0ee-48c5-baaa-70d1479ca20f}
}