@book{67836,
	author = {Yrjö-Koskinen, Yrjö Sakari,},
	title = {Opiksi ja huviksi: Lukemisia Suomen perheille},
	publisher = {Project Gutenberg,},
	year = {2008},
	address = {Salt Lake City, UT :},
	note = {Release date is 2008-10-15},
	url = {https://www.gutenberg.org/ebooks/26927}
}