@book{7757,
	author = {United States.},
	title = {Forestry in nature study.},
	publisher = {Govt., print., off.,},
	year = {1909.},
	series = {U.S. Dept. of agriculture. Office of experiment stations. Special circular},
	address = {Washington,},
	note = {"References": p. 8-10.},
	url = {http://hdl.loc.gov/loc.gdc/scd0001.00028219015}
}