@book{43672,
	author = {Hitchman, Michael P. },
	title = {Geometry with an Introduction to Cosmic Topology (ebook)},
	publisher = {: Michael P. Hitchman},
	year = {2018 },
	url = {https://open.umn.edu/opentextbooks/textbooks/geometry-with-an-introduction-to-cosmic-topology}
}