@book{115957,
	author = {Stewart, Balfour, and Tait, Peter Guthrie,},
	title = {The unseen universe},
	publisher = {Project Gutenberg,},
	year = {2025},
	address = {Salt Lake City, UT :},
	edition = {Seventh edition (revised, and enlarged.)},
	note = {Release date is 2025-01-28},
	url = {https://archive.org/details/unseenuniverseor00stewrich/page/n5/mode/2up}
}