@book{20593,
	author = {Greenstein, George},
	title = {Understanding the Universe: An Inquiry Approach to Astronomy and the Nature of Scientific Research},
	publisher = {Cambridge University Press},
	year = {2013},
	address = {Cambridge},
	edition = {1st ed.},
	url = {https://doi.org/10.1017/CBO9781139022477}
}