@book{16921,
	author = {Frank, Jacob},
	title = {Engels @ 200},
	url = {https://www.buechner-verlag.de/wp/wp-content/uploads/2020/09/oa_9783963177620-1.pdf||https://www.buechner-verlag.de/wp/wp-content/uploads/2020/09/9783963172250_hp_gross.jpg}
}