@book{79856,
	author = {Planck, Max, and Wills, A. P.,},
	title = {Eight Lectures on Theoretical Physics, Delivered at Columbia University in 1909},
	publisher = {Project Gutenberg,},
	year = {2012},
	address = {Salt Lake City, UT :},
	note = {Release date is 2012-02-29},
	url = {https://www.gutenberg.org/ebooks/39017}
}