@book{20966,
	author = {Persing, Ellis C. and Peeples, Elizabeth K.,},
	title = {Elementary science by grades ...},
	publisher = {D. Appleton and company},
	year = {[c1928-30]},
	series = {Elementary science by grades.},
	address = {New York,},
	note = {"Edited by F. W. Ballou."}
}