@book{110279,
	author = {Heffron, Ida Cassa},
	title = {Lessons in chalk modeling: The new method of map drawing},
	publisher = {Project Gutenberg,},
	year = {2022},
	address = {Salt Lake City, UT :},
	note = {Release date is 2022-12-07},
	url = {https://www.gutenberg.org/ebooks/69493}
}