@book{103579,
	author = {Swinden, Jan Hendrik van, and Eekhoff, W.},
	title = {Beschrijving van het Rijks-Planetarium te Franeker :},
	publisher = {Project Gutenberg,},
	year = {2020},
	address = {Salt Lake City, UT :},
	note = {Release date is 2020-07-25},
	url = {https://www.gutenberg.org/ebooks/62755}
}