@book{20675,
	author = {Svensen, Carl L.},
	title = {A study of the teaching of mechanical drawing in the public schools, colleges and universities of Ohio,},
	publisher = {The F.J. Heer printing co.,},
	year = {1922.},
	address = {Columbus, O.,},
	url = {http://hdl.loc.gov/loc.gdc/scd0001.00199366130}
}